Dana Loomis
Research interests
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InterestsOccupational Epidemiology, Environmental Epidemiology, Environmental Health, Exposure Assessment, Environmental Exposure, Medical Geology, Air Pollution
Publications
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3.64Impact points
Increased lung cancer mortality among chrysotile asbestos textile workers is more strongly associated with exposure to long thin fibres.
Occupational and environmental medicine. 05/2012;
BackgroundAnimal data and physical models suggest that the carcinogenicity of asbestos fibres is related to their size and shape.ObjectivesTo investigate the influence of fibre length and diameter on lung cancer risk in workers at asbestos textile mills in North Carolina and South Carolina, USA.Meth... [more] BackgroundAnimal data and physical models suggest that the carcinogenicity of asbestos fibres is related to their size and shape.ObjectivesTo investigate the influence of fibre length and diameter on lung cancer risk in workers at asbestos textile mills in North Carolina and South Carolina, USA.MethodsMen and women (n=6136) who worked ≥30 days in production and were employed between 1940 and 1973 were enumerated and followed for vital status through 2003. A matrix of fibre size-specific exposure estimates was constructed using determinations of fibre numbers and dimensions through analysis of 160 historical dust samples by transmission electron microscopy. Associations of lung cancer mortality with metrics of fibre exposure were estimated by Poisson regression with adjustment for age, sex, race and calendar year.ResultsExposure to fibres throughout the range of length and diameter was significantly associated with increased risk of lung cancer. Models for fibres >5 μm long and <0.25 μm in diameter provided the best fit to the data, while fibres 5-10 μm long and <0.25 μm in diameter were associated most strongly with lung cancer mortality (log rate about 4% per IQR, p<0.001). When indicators of mean fibre length and diameter were modelled simultaneously, lung cancer risk increased as fibre length increased and diameter decreased.ConclusionsThe findings support the hypothesis that the occurrence of lung cancer is associated most strongly with exposure to long thin asbestos fibres. The relationship of cancer risk and fibre dimensions should be examined in cohorts exposed to other types of fibres.
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3.64Impact points
Estimates of historical exposures by phase contrast and transmission electron microscopy for pooled exposure--response analyses of North Carolina and South Carolina, USA asbestos textile cohorts.
Occupational and environmental medicine. 01/2011; 68(8):593-8.
To develop pooled size-specific asbestos fiber exposure estimates for North Carolina and South Carolina asbestos textile plants. Airborne sample data and prior exposure estimates by phase-contrast microscopy (PCM) for the two cohorts were reviewed and compared. Estimates by transmission electron mic... [more] To develop pooled size-specific asbestos fiber exposure estimates for North Carolina and South Carolina asbestos textile plants. Airborne sample data and prior exposure estimates by phase-contrast microscopy (PCM) for the two cohorts were reviewed and compared. Estimates by transmission electron microscopy (TEM) for 160 membrane filter samples from all plant were pooled. Poisson regression models were developed to predict bivariate diameter/length airborne fiber size distributions based on independent categorical variables for fiber diameter, fiber length, plant, and exposure zone. The model predicted bivariate diameter/length distributions were expressed as the proportion of fibers in 28 size-specific cells and these data were used to calculate PCM to TEM adjustment factors in order to estimate fiber size-specific exposures for the pooled cohort. Exposure levels in the North Carolina plants were in excess of 50 f/cc for many operations through about 1955 owing to lack of dust control measures in early years whereas levels in the South Carolina plant were generally less than 10 f/cc by about 1950. The Poisson regression models found covariates for plant department to be a stronger predictor of bivariate size proportions than plant; however, a plant effect was observed. The final Poisson models demonstrated good fit to the observed data. Consistent with early studies, fiber exposures in the North Carolina plants were much higher than in South Carolina plant. Use of the predicted size-specific TEM exposures by plant and department based on the Poisson model predictions should reduce exposure.
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3.64Impact points
Prospective study of incident injuries among southeastern United States commercial fishermen.
Occupational and environmental medicine. 10/2010; 67(12):829-36.
The purpose of this study was to describe occupational exposures and the incidence of non-fatal injuries among a group of southeastern US small-scale fishermen. Participants (n=219) were enrolled in a prospective cohort study and followed from August 1999 to May 2002. Demographic information was obt... [more] The purpose of this study was to describe occupational exposures and the incidence of non-fatal injuries among a group of southeastern US small-scale fishermen. Participants (n=219) were enrolled in a prospective cohort study and followed from August 1999 to May 2002. Demographic information was obtained at baseline, and weekly and biweekly telephone interviews elicited information on number of days worked, fishery, fishing gear used, maintenance work, glove use and any work-related injury events. Incidence rate ratios (IRR) and 95% CIs were calculated with Poisson regression for each factor and multivariate models controlled for potential confounders. Over a third of participants (81/217) reported 125 injury events over 46 153 work-days for rate of 2.74 per 1000 work-days (95% CI 2.19 to 3.41). The majority of injuries were penetrating wounds to the hand, thumb and finger (35%) or back sprains and strains (8%); most required no medical care or time off work (67%). Injury rates were similar for on and off the water work (1.9 per 1000 work-days). Injury rates differed by fishery, water location and month. Factors associated with an increased injury rate included working on someone else's boat and maintenance work. Glove use was protective. Similar injury characteristics were observed in small-scale fishing as compared to large-scale. For small-scale fishermen, off and on the water work locations, and particularly maintenance work, were important predictors of injury. Despite the protective association for glove use, penetrating wounds to the hand, thumb and finger were common.
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3.64Impact points
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3.64Impact points
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3.64Impact points
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3.64Impact points
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3.64Impact points
Asbestos fiber dimensions and lung cancer mortality among workers exposed to chrysotile.
Occupational and environmental medicine. 11/2009;
OBJECTIVES: To estimate exposures to asbestos fibers of specific sizes among asbestos textile manufacturing workers exposed to chrysotile using data from transmission electron microscopy (TEM) and to evaluate the extent to which the risk of lung cancer varies with fiber length and diameter. METHODS:... [more] OBJECTIVES: To estimate exposures to asbestos fibers of specific sizes among asbestos textile manufacturing workers exposed to chrysotile using data from transmission electron microscopy (TEM) and to evaluate the extent to which the risk of lung cancer varies with fiber length and diameter. METHODS: 3803 workers employed for at least 1 day between 1 January 1950 and 31 December 1973 in any of 3 plants in North Carolina, USA that produced asbestos textile products and followed for vital status through 31 December 2003 were included. Historical exposures to asbestos fibers were estimated from work histories and 3578 industrial hygiene measurements taken 1935-1986. Exposure-response relations for lung cancer were examined within the cohort using Poisson regression. RESULTS: Indicators of fiber length and diameter obtained by TEM were positively and significantly associated with increasing risk of lung cancer. Exposures to longer and thinner fibers tended to be most strongly associated with lung cancer, and models for these fibers fit the data best. Simultaneously modeling indicators of cumulative mean fiber length and diameter yielded a positive coefficient for fiber length and a negative one for fiber diameter. CONCLUSIONS: The results support the hypothesis that the risk of lung cancer among workers exposed to chrysotile asbestos increases with exposure to longer fibers. More research is needed to improve the characterization of exposures by fiber size and number and to analyze the associated risks in a variety of industries and populations.
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3.73Impact points
Case-control study of a gastroschisis cluster in Nevada.
Archives of pediatrics & adolescent medicine. 11/2009; 163(11):1000-6.
OBJECTIVE: To identify potential risk factors associated with a sudden increase in gastroschisis cases in northern Nevada. DESIGN: Case-control study. SETTING: Medical centers and a pregnancy care center in Reno, Nevada. PARTICIPANTS: Participants (n = 14) were women who gave birth to infants with g... [more] OBJECTIVE: To identify potential risk factors associated with a sudden increase in gastroschisis cases in northern Nevada. DESIGN: Case-control study. SETTING: Medical centers and a pregnancy care center in Reno, Nevada. PARTICIPANTS: Participants (n = 14) were women who gave birth to infants with gastroschisis at either of the 2 medical centers in Reno, Nevada, from April 5, 2007, through April 4, 2008. Controls (n = 57) were selected from the same pregnancy center providing perinatal care to the cases and were matched 4:1 to the case mothers by maternal date of birth within 1 year. MAIN EXPOSURES: Environmental exposures and illnesses during pregnancy. OUTCOME MEASURES: Association of gastroschisis with illnesses, medications, or environmental exposures. RESULTS: Gastroschisis was associated with the use of methamphetamine (odds ratio [OR], 7.15; 95% confidence interval [CI], 1.35-37.99) or any vasoconstrictive recreational drug (methamphetamine, amphetamine, cocaine, ecstasy) (OR, 4.46; 95% CI, 1.21-16.44) before pregnancy. When we limited self-reported illnesses to those occurring during the first trimester of pregnancy, chest colds (OR, 16.77; 95% CI, 1.88-150.27) and sore throats (OR, 12.72; 95% CI, 1.32-122.52) were associated with gastroschisis. CONCLUSIONS: These findings add strength to the hypothesis that use of methamphetamine and related drugs is a risk factor for gastroschisis and raise questions about the risks associated with infections.
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2.16Impact points
Area-Based Socioeconomic Characteristics of Industries at High Risk for Violence in the Workplace.
American journal of community psychology. 10/2009;
This study examined socioeconomic factors associated with the presence of workplaces belonging to industries reported to be at high risk for worker homicide. The proportion of 2004 North Carolina workplaces in high-risk industries was computed following spatial linkage of individual workplaces to 20... [more] This study examined socioeconomic factors associated with the presence of workplaces belonging to industries reported to be at high risk for worker homicide. The proportion of 2004 North Carolina workplaces in high-risk industries was computed following spatial linkage of individual workplaces to 2000 United States Census Block Groups (n = 3,925). Thirty census-derived socioeconomic variables (selected a priori as potentially predictive of violence) were summarized using exploratory factor analysis into poverty/deprivation, human/economic capital, and transience/instability. Multinomial logistic regression models indicate associations between higher proportion of workplaces belonging to high-risk industries and Block Groups with more poverty/deprivation or transience/instability and less human/economic capital. The relationship between human/economic capital and Block Groups proportion of high-risk industry workplaces was modified by levels of transience/instability. Community characteristics therefore contribute to the potential for workplace violence, and future research should continue to understand the relationship between social context and workplace violence risk.
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3.64Impact points
OEM's Impact Factor Continues Moving Upward.
Occupational and environmental medicine. 08/2009;
OEM's Journal Impact Factor (IF) has continued its upward trend and now stands at 3.302 for 2008. This is the highest IF the Journal has ever had and it caps 5 straight years of steady progress, giving an overall rise of 79% relative to 2003. OEM has also moved up substantially within its catego... [more] OEM's Journal Impact Factor (IF) has continued its upward trend and now stands at 3.302 for 2008. This is the highest IF the Journal has ever had and it caps 5 straight years of steady progress, giving an overall rise of 79% relative to 2003. OEM has also moved up substantially within its category of 105 journals covering public, environmental and occupational health and is now ranked 16th in this group-the only occupational health journal among the top 20.
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4.37Impact points
Political Economy of US States and Rates of Fatal Occupational Injury.
American journal of public health. 07/2009;
Objectives. We investigated the extent to which the political economy of US states, including the relative power of organized labor, predicts rates of fatal occupational injury. Methods. We described states' political economies with 6 contextual variables measuring social and political condition... [more] Objectives. We investigated the extent to which the political economy of US states, including the relative power of organized labor, predicts rates of fatal occupational injury. Methods. We described states' political economies with 6 contextual variables measuring social and political conditions: "right-to-work" laws, union membership density, labor grievance rates, state government debt, unemployment rates, and social wage payments. We obtained data on fatal occupational injuries from the National Traumatic Occupational Fatality surveillance system and population data from the US national census. We used Poisson regression methods to analyze relationships for the years 1980 and 1995. Results. States differed notably with respect to political-economic characteristics and occupational fatality rates, although these characteristics were more homogeneous within rather than between regions. Industry and workforce composition contributed significantly to differences in state injury rates, but political-economic characteristics of states were also significantly associated with injury rates, after adjustment accounting for those factors. Conclusions. Higher rates of fatal occupational injury were associated with a state policy climate favoring business over labor, with distinct regional clustering of such state policies in the South and Northeast.
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4.24Impact points
Contrasting Robbery- and Non-Robbery-Related Workplace Homicide North Carolina, 1994-2003.
American journal of preventive medicine. 06/2009;
BACKGROUND: Most research regarding the perpetration of occupational homicide has focused on robbery-related violence; relatively little is known about the circumstances surrounding non-robbery-related occupational homicides and interventions that may prevent these events. A case series was assemble... [more] BACKGROUND: Most research regarding the perpetration of occupational homicide has focused on robbery-related violence; relatively little is known about the circumstances surrounding non-robbery-related occupational homicides and interventions that may prevent these events. A case series was assembled and utilized to examine occupational homicides that were and were not motivated by robbery to determine if select characteristics of the events differed according to the perpetrator's motivation for the crime and relationship to the workplace. METHODS: Information on occupational homicides that occurred in North Carolina from 1994 to 2003 was abstracted from medical examiners' records and death certificates and was obtained by interviews with law-enforcement officers and from newspaper accounts (data collection occurred in 1996-2001 and 2003-2007). Each homicide was classified by motive and the perpetrator's relationship to the workplace and its employees. Characteristics of robbery-motivated and non-robbery-motivated homicides were compared. Analysis was conducted in 2006 and 2007. RESULTS: Most occupational homicides occurred during robbery of the workplace (64%). However, 36% of occupational homicides during the study period were not robbery-related. Strangers perpetrated 73% of robbery-related killings but only 11% of non-robbery-related homicides. Homicides unrelated to robbery occurred in several industrial sectors, including retail (28%); service (26%); and manufacturing (22%), whereas robbery-related homicides occurred overwhelmingly in retail (67%). The type of firearm used to perpetrate these killings differed by the perpetrator's relationship to the workplace. CONCLUSIONS: Non-robbery-related homicides constitute a meaningful proportion of occupational homicides, and the characteristics of these cases can differ from those that are robbery-related. The current system by which workplace homicides are classified could be expanded to include robbery motivation. Efforts to examine occupational-homicide-prevention strategies for non-robbery-related homicides are important.
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3.64Impact points
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3.64Impact points
Lung Cancer Mortality and Fiber Exposures among North Carolina Asbestos Textile Workers.
Occupational and environmental medicine. 04/2009;
OBJECTIVE: To describe mortality among workers exposed to chrysotile asbestos and evaluate the relationship of lung cancer to asbestos fiber exposure. METHODS: Workers employed for at least 1 day between 1 January 1950 and 31 December 1973 in any of four plants in North Carolina, USA that produced a... [more] OBJECTIVE: To describe mortality among workers exposed to chrysotile asbestos and evaluate the relationship of lung cancer to asbestos fiber exposure. METHODS: Workers employed for at least 1 day between 1 January 1950 and 31 December 1973 in any of four plants in North Carolina, USA that produced asbestos textile products were enumerated. Vital status was ascertained through 31 December 2003. Historical exposures to asbestos fibers were estimated from work histories and 3578 industrial hygiene measurements taken 1935-1986. Mortality of the cohort was compared to that of the national population via standardized mortality ratios (SMRs). Exposure-response relations for lung cancer were examined within the cohort using Poisson regression to compute adjusted mortality rate ratios. RESULTS: Follow-up of 5770 workers included in the cohort resulted in 181,640 person-years of observation, with 2583 deaths from all causes and 277 from lung cancer. Mortality from all causes, all cancers and lung cancer was significant higher than expected, with SMRs of 1.45 for all causes, 1.34 for all cancer and 1.95 (95% CI 1.73-2.20) for lung cancer. SMRs for pleural cancer, mesothelioma and pneumoconiosis and were also elevated. The risk of lung cancer and asbestosis increased with cumulative fiber exposure (RR 1.102 per 100 fiber-year/ml, 95% CI 1.044-1.164. and RR 1.249 per 100 fiber-year/ml, 95% CI 1.186-1.316, respectively, for total career exposure). CONCLUSIONS: This study of provides further evidence that exposure to chrysotile asbestos in textile manufacturing is associated with increased risk of lung cancer, asbestosis cancer of the pleura and mesothelioma.
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2.80Impact points
A randomized controlled trial of the concrete biosand filter and its impact on diarrheal disease in Bonao, Dominican Republic.
The American journal of tropical medicine and hygiene. 02/2009; 80(2):286-93.
A number of household water treatment and safe storage technologies, such as chlorine disinfection, solar disinfection, and ceramic filtration, have been documented for their ability to reduce diarrheal disease and improve microbial water quality. The biosand filter (BSF) is a promising household wa... [more] A number of household water treatment and safe storage technologies, such as chlorine disinfection, solar disinfection, and ceramic filtration, have been documented for their ability to reduce diarrheal disease and improve microbial water quality. The biosand filter (BSF) is a promising household water treatment technology in use by > 500,000 people globally. The purpose of this research was to document the ability of BSFs to improve water quality and to reduce diarrheal disease in user compared with non-user households in a randomized controlled trial in Bonao, Dominican Republic, during 2005-2006. During the 6-month intervention period, 75 BSF households had significantly improved drinking water quality on average compared with 79 control households (P < 0.001). Based on random intercepts logistic regression, BSF households had 0.53 times the odds of diarrheal disease as control households, indicating a significant protective effect of the BSF against waterborne diarrheal disease.
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1.72Impact points
Ergonomic risk factors for low back pain in North Carolina crab pot and gill net commercial fishermen.
American journal of industrial medicine. 01/2009;
BACKGROUND: The objective of this research was to determine the association between LBP that limited or interrupted fishing work and ergonomic low back stress measured by (1) self-reported task and (2) two ergonomic assessment methods of low back stress. METHODS: Eligible participants were from a co... [more] BACKGROUND: The objective of this research was to determine the association between LBP that limited or interrupted fishing work and ergonomic low back stress measured by (1) self-reported task and (2) two ergonomic assessment methods of low back stress. METHODS: Eligible participants were from a cohort of North Carolina commercial fishermen followed for LBP in regular clinic visits from 1999 to 2001 (n = 177). Work history, including crab pot and gill net fishing task frequency, was evaluated in a telephone questionnaire (n = 105). Ergonomic exposures were measured in previous study of 25 fishermen using two methods. The occurrence rate of LBP that limited or interrupted fishing work since last visit (severe LBP) was evaluated in a generalized Poisson regression model. RESULTS: Predictors of severe LBP included fishing with crew members and a previous history of severe LBP. Among crab pot and gill net fishermen (n = 89), running pullers or net reels, sorting catch, and unloading catch were associated with an increased rate of LBP. Percent of time in forces >20 lb while in non-neutral trunk posture, spine compression >3,400 N, and National Institute of Occupational Safety and Health lifting indices >3.0 were associated with LBP. CONCLUSIONS: Tasks characterized by higher (unloading boat and sorting catch) and lower (running puller or net reel) ergonomic low back stress were associated with the occurrence of severe LBP. History of LBP, addition of crew members, and self-selection out of tasks were likely important contributors to the patterns of low back stress and outcomes we observed. Based on the results of this study, a participatory ergonomic intervention study is currently being conducted to develop tools and equipment to decrease low back stress in commercial crab pot fishing. Am. J. Ind. Med. (c) 2009 Wiley-Liss, Inc.
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5.51Impact points
Risk Factors for Injury Among High School Football Players.
Epidemiology (Cambridge, Mass.). 01/2009;
BACKGROUND:: Football is the most popular interscholastic high school sport in the United States. Prior research has described a higher rate of injury among high school football players than in other sports, but few studies have examined potential predictors while controlling for other risk factors.... [more] BACKGROUND:: Football is the most popular interscholastic high school sport in the United States. Prior research has described a higher rate of injury among high school football players than in other sports, but few studies have examined potential predictors while controlling for other risk factors. METHODS:: Using a 2-stage cluster sampling technique, we conducted a prospective cohort study from 1996 to 1999 among varsity athletes from 12 sports in 100 North Carolina high schools. A total of 3323 football players participated. Injury exposure and risk factor data were collected by trained school personnel. Incidence rates, rate ratios, and odds ratios (ORs) were estimated using Poisson and logistic regression. RESULTS:: There were 1064 injured athletes and 1238 injuries; 106 injuries resulted in greater than 3 weeks lost from participation. The overall incidence rate was 3.54 per 1000 athlete-exposures (95% confidence interval [CI] = 3.31-3.78). The rate of game injury was 9 times that of practice injury (OR = 9.2; 95% CI = 6.6-11). Athletes with a prior injury had twice the injury rate of those without (1.9; 1.5-2.4). Among those injured, having a coach with more experience, qualifications, and training was associated with half the odds of severe injury (0.49; 0.27-0.92). CONCLUSIONS:: Prior injury, additional years of playing experience, and older age were predictors of injury incidence after controlling for multiple risk factors. A high level of coaching skills did not reduce the injury rate, but was protective against severe injury.
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5.51Impact points
Air pollution and mortality in Latin America: the role of education.
Epidemiology (Cambridge, Mass.). 11/2008; 19(6):810-9.
People with less education in Europe, Asia, and the United States are at higher risk of mortality associated with daily and longer-term air pollution exposure. We examined whether educational level modified associations between mortality and ambient particulate pollution (PM10) in Latin America, usi... [more] People with less education in Europe, Asia, and the United States are at higher risk of mortality associated with daily and longer-term air pollution exposure. We examined whether educational level modified associations between mortality and ambient particulate pollution (PM10) in Latin America, using several timescales. The study population included people who died during 1998-2002 in Mexico City, Mexico; Santiago, Chile; and São Paulo, Brazil. We fit city-specific robust Poisson regressions to daily deaths for nonexternal-cause mortality, and then stratified by age, sex, and educational attainment among adults older than age 21 years (none, some primary, some secondary, and high school degree or more). Predictor variables included a natural spline for temporal trend, linear PM10 and apparent temperature at matching lags, and day-of-week indicators. We evaluated PM10 for lags 0 and 1 day, and fit an unconstrained distributed lag model for cumulative 6-day effects. The effects of a 10-microg/m increment in lag 1 PM10 on all nonexternal-cause adult mortality were for Mexico City 0.39% (95% confidence interval = 0.13%-0.65%); São Paulo 1.04% (0.71%-1.38%); and for Santiago 0.61% (0.40%-0.83%). We found cumulative 6-day effects for adult mortality in Santiago (0.86% [0.48%-1.23%]) and São Paulo (1.38% [0.85%-1.91%]), but no consistent gradients by educational status. PM10 had important short- and intermediate-term effects on mortality in these Latin American cities, but associations did not differ consistently by educational level.
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3.64Impact points
Estimates of Historical Exposures by Phase Contrast and Transmission Electron Microscopy in North Carolina USA Asbestos Textile Plants.
Occupational and environmental medicine. 09/2008;
OBJECTIVES: To develop a job-exposure matrix (JEM) for historical asbestos fiber exposures in three asbestos textile plants and to develop fiber size-specific estimates of exposure to airborne asbestos dust for use in epidemiological investigations of exposure-response relations. METHODS: Historical... [more] OBJECTIVES: To develop a job-exposure matrix (JEM) for historical asbestos fiber exposures in three asbestos textile plants and to develop fiber size-specific estimates of exposure to airborne asbestos dust for use in epidemiological investigations of exposure-response relations. METHODS: Historical samples of asbestos dust collected in three North Carolina, USA asbestos textile plants were obtained. Plant specific samples were used to express impinger dust concentrations as fiber concentrations by phase contract microscopy (PCM). Mixed models were used to estimate PCM exposures by plant, department, job, and calendar time. Archived membrane filter samples collected in these plants were analyzed by transmission electron microscopy (TEM) to determine the bivariate diameter/length distribution of airborne fibers by plant and operation. Previously published procedures to adjust standard PCM fiber concentration measures using the TEM data were applied to the PCM estimates to produce fiber size-specific exposures. RESULTS: A total of 3240 samples were used in the mixed model and the resulting model accounted for approximately 64% of variability in PCM fiber levels. Estimated PCM fiber levels were very high in these plants in the 1930's, with some operations in excess of 200 fibers/cc, and decreased appreciably over time, with most operations < 15-20 fibers/cc by 1970. A total of 77 airborne dust samples were used to measure diameter and length for over 22,776 fibers or fiber bundles by TEM. A small proportion of airborne fibers were measured by PCM (>0.25 microm in diameter and >5 microm in length) and the proportion varied considerably by plant and operation (range 2.9% to 10.0%). The bivariate diameter/length distribution of airborne fibers was expressed as the proportion of fibers in 28 size-specific cells and this distribution demonstrated a relatively high degree of variability by plant and operation. PCM adjustment factors also varied substantially across plants and operations. CONCLUSIONS: These data provide new information concerning airborne fiber levels and characteristics in three historically important asbestos textile plants. PCM concentrations were high in early years and TEM data demonstrate that the vast majority of airborne fibers inhaled by the workers were shorter than 5 microm in length, and thus not included in the PCM-based fiber counts. Both the PCM and TEM size-specific exposures will add new information when linked with an ongoing cohort study for exposure-response analyses.
Following (7)
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Luenda E Charles
CDC, National Institute for Occupational Safety and Health -
Gonzalo G. Garcia-Vargas
Universidad Juárez del Estado de Durango -
Sarah B Knowles
Palo Alto Medical Foundation Research Institute -
Vilma Sousa Santana
Universidade Federal da Bahia -
Albert John Bailer
Miami University
