Tai Hing Lam

The University of Hong Kong, Hong Kong, Hong Kong

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Publications (524)2084.87 Total impact

  • [Show abstract] [Hide abstract]
    ABSTRACT: To examine the association between serum c-reactive protein (CRP) concentration and the metabolic syndrome (MS) using the International Diabetes Federation Metabolic Syndrome Guidelines (April, 2005) definition in an older Chinese population. Three thousand and fourteen men and 7275 women aged 50-85 years were recruited and received a full medical check-up including measurement of blood pressure, obesity indices, fasting total, LDL-, HDL-cholesterol, triglycerides, glucose and c-reactive protein. Data describing socioeconomic and lifestyle factors was also collected. Vascular risk factors including waist circumference, weight gain and waist gain since the age of 18, body mass index, waist-hip-ratio, triglyceride, HDL-cholesterol, and systolic and diastolic blood pressures were positively associated with CRP in both men and women (p from <0.001 to 0.016). Compared to those without MS components, adjusted odds ratios for having elevated CRP increased in those with the MS or its components compared those without MS or components (all p<0.001), except for the low HDL-cholesterol in both genders and raised fasting glucose in men. Similarly, the risk of elevated CRP increased with escalating MS components even after adjustment of a range of potential confounders. There is a strong relationship between CRP and the constellation of MS components and associated vascular risk in this older Chinese population.
    Atherosclerosis 10/2007; 194(2):483-9. · 3.71 Impact Factor
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    Hong Kong medical journal = Xianggang yi xue za zhi / Hong Kong Academy of Medicine 09/2007; 13(4):332; author reply 332-3.
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    ABSTRACT: This study examined 1,361 Chinese adolescents who reported self-injurious behaviors. Groups A and B both acknowledged deliberate self-injury, but only Group A had made a suicide attempt. Group C reported accidental self-injury. Deliberate self-injurers (Groups A and B) were more frequently girls, older, and with more suicidal ideation. Group A had more psychopathology, environmental and suicide-related risk factors than group B and C. Group C had higher depressive symptoms than noninjured controls. The study clarifies differences among self-injurious behavior groups based on expressed deliberate self-injury and self-reported suicide attempt. These three groups appear to present a continuum of risk.
    Suicide and Life-Threatening Behavior 09/2007; 37(4):453-66. · 1.33 Impact Factor
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    ABSTRACT: Objective:We examined the psychometric properties of the Eating Disorder Diagnostic Scale (EDDS) in a community sample of Hong Kong school children.Method:Participants (359 boys and 387 girls), aged 12 to 19 years, were assessed on the EDDS on two occasions, one month apart. Factor structure, internal consistency, test-retest reliability, and validity against the Eating Disorders Examination–Questionnaire (EDE-Q) and Center for Epidemiological Studies-Depression (CES-D) were investigated.Results:Four groupings emerged on exploratory factor analysis: body dissatisfaction, bingeing behaviors, bingeing frequency, and frequency of compensatory behaviors. Items loaded on the same factors for boys and girls. Internal consistency for these factors was acceptable. Test-retest reliability was high for body dissatisfaction factor but weak to moderate for other factors and for diagnoses. High concurrent validity with the EDE-Q, and correlation with the CES-D was shown.Conclusion:We offer preliminary reliability and validity evidence to support the further development of the EDDS as a screening instrument to assess eating disturbances in Hong Kong youth. © 2007 by Wiley Periodicals, Inc.
    International Journal of Eating Disorders 08/2007; 40(6):569 - 574. · 3.03 Impact Factor
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    ABSTRACT: Most dietary recommendations are based on studies of limited power and do not adequately reflect the current knowledge base, particularly with regard to effects of diet on clinical outcomes, the most important endpoint from the patients' perspective. In this review we discusses the current state of dietary research, and present a summary of the evidence upon which to base dietary recommendations and guidelines for atherosclerotic vascular disease prevention. We also highlight the complexity and limitations of interpreting current diet-based epidemiological studies in isolation.
    Cardiovascular & Haematological Disorders - Drug Targets(Formerly Current Drug Targets - Cardiovascular & Hematological Disorders) 07/2007; 7(2):87-97.
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    ABSTRACT: Cigarette smoking is becoming increasingly common in Asia while quitting remains rare, in part because of a lack of knowledge about the risks of smoking. This study compared the risk of death from lung cancer associated with smoking habits in Australia and New Zealand and in Asia by using data from the Asia Pacific Cohort Studies Collaboration: 31 studies involving 480,125 individuals. Cox regression models were used. The hazard ratios for lung cancer mortality associated with current smoking were, for men, 2.48 (95% confidence interval (CI): 1.99, 3.11) in Asia versus 9.87 (95% CI: 6.04, 16.12) in Australia and New Zealand; p for homogeneity <0.0001. For women, the corresponding estimates were 2.35 (95% CI: 1.29, 4.28) in Asia versus 19.33 (95% CI: 10.0, 37.3) in Australia and New Zealand; p for homogeneity <0.0001. Quitting was beneficial in both regions; the hazard ratios for former compared with current smokers were 0.69 (95% CI: 0.53, 0.92) in Asia and 0.30 (95% CI: 0.22, 0.41) in Australia and New Zealand. The lesser effect in Asia was partly explained by the fewer number of cigarettes smoked and the shorter duration of follow-up in Asian studies. These results suggest that tobacco control policies in Asia should not solely concentrate on preventing the uptake of smoking but also attend to cessation.
    American Journal of Epidemiology 07/2007; 165(11):1280-6. · 4.78 Impact Factor
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    ABSTRACT: To assess the association between systolic blood pressure (SBP) and cardiovascular diseases (CVD) among participants with and without diabetes from cohorts in the Asia-Pacific region. Hazards ratios and 95% confidence intervals (CI) for CVD were calculated from Cox models, stratified by sex and region and adjusted for age using individual participant data from 36 cohort studies. Repeat measurements of SBP were used to adjust for regression dilution bias. During follow-up, 7387 fatal or non-fatal cardiovascular endpoints were recorded among 368 307 participants (6.4% with diabetes). SBP was associated with coronary heart disease (CHD), ischaemic stroke and haemorrhagic stroke in a continuous log-linear fashion among individuals with diabetes, as well as those without diabetes. Overall, each 10 mmHg higher usual SBP was associated with 18% (95% CI: 9-27%) and 23% (19-26%) greater risk for CHD among those with and without diabetes, respectively. The corresponding values for ischaemic stroke were 29% (14-45%) and 43% (37-50%), and for haemorrhagic stroke, 56% (32-83%) and 74% (66-82%). The test for heterogeneity by diabetes status in each of these associations was not significant (P >or= 0.10). Systolic blood pressure is an important marker of risk of CVD in people with and without diabetes. A given reduction in systolic blood pressure is likely to have a similar relative effect on reducing the risk of a cardiovascular event, regardless of diabetes status.
    Journal of Hypertension 06/2007; 25(6):1205-13. · 4.22 Impact Factor
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    ABSTRACT: The metabolic syndrome has been associated with increased mortality in some Caucasian populations, but data in Asian populations are not available. We present data describing the association of the metabolic syndrome with mortality. The impact of the US National Cholesterol Education Program Adult Treatment Panel III (NCEP ATP III) metabolic syndrome guidelines definition (using Asian central obesity criteria) on mortality was examined using Cox regression analyses in a population-based cohort (n = 2863) of Chinese subjects. The cohort was followed up for a mean duration of 8.45 years, a total of 24 101 person-years, with 89 deaths (33.7% of vascular origin). Compared to those without any component of the metabolic syndrome, following adjustment for age, socioeconomic status and a range of lifestyle habits, those with the metabolic syndrome had increased risk of both all-cause [hazard ratio (HR) 2.02, 95% confidence interval (CI) 1.02-4.00, P for trend = 0.037] and vascular disease (HR 6.39, 95% CI 1.40-29.2, P < 0.05, P for trend = 0.002) mortality. When those with 0-2 components were compared to those with the metabolic syndrome, the HRs were 1.49 (95% CI 0.95-2.33, P = 0.084) and 3.36 (95% CI 1.57-7.19, P = 0.002), respectively. This study shows that the metabolic syndrome is associated with increased mortality risk in an Asian population. The high prevalence of the metabolic syndrome, particularly in the elderly, forewarns of a rapidly increasing problem in mainland China, and other Asian populations, which could have overwhelming public health ramifications.
    Clinical Endocrinology 06/2007; 66(5):666-71. · 3.40 Impact Factor
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    ABSTRACT: We investigated the association of the metabolic syndrome with new-onset diabetes in the Hong Kong Cardiovascular Risk Factor Prevalence Study cohort. We followed up on 1,679 subjects without diabetes at baseline. Those with a previous diagnosis of diabetes or those who were receiving drug treatment were considered to be diabetic. The remaining subjects underwent a 75-g oral glucose tolerance test (OGTT). Diabetes was defined by plasma glucose > or =7.0 mmol/l with fasting and/or > or =11.1 mmol/l at 2 h. The prevalences of the metabolic syndrome at baseline were 14.5 and 11.4%, respectively, according to U.S. National Cholesterol Education Program (NCEP) and International Diabetes Federation (IDF) criteria. After a median of 6.4 years, there were 66 and 54 new cases of diabetes in men and women, respectively. The metabolic syndrome at baseline predicted incident diabetes. Hazard ratios (HRs) for the NCEP and IDF definitions of the syndrome were 4.1 [95% CI 2.8-6.0] and 3.5 [2.3-5.2], respectively. HRs for fasting plasma glucose (FPG) > or =6.1 or 5.6 mmol/l were 6.9 [4.1-11.5] and 4.1 [2.8-6.0], respectively. The NCEP and IDF criteria had 41.9 and 31.7% sensitivity and 87.5 and 90.2% specificity, respectively. Their positive predictive values were low, approximately 20%, but their negative predictive values were approximately 95%. The metabolic syndrome, particularly its component, elevated FPG, predicts diabetes in Chinese. An individual without the metabolic syndrome is unlikely to develop diabetes, but one who has it should practice therapeutic lifestyle changes and have periodic FPG measurements to detect new-onset diabetes.
    Diabetes care 06/2007; 30(6):1430-6. · 7.74 Impact Factor
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    ABSTRACT: Although the harms of smoking are well established, it is unclear how they extend into old age in the Chinese. To examine the relationship of smoking with all-cause and major cause-specific mortality in elderly Chinese men and women, respectively, in Hong Kong. Mortality by smoking status was examined in a prospective cohort study of 56,167 (18,749 men, 37,416 women) Chinese aged > or = 65 years enrolled from 1998 to 2000 at all the 18 elderly health centres of the Hong Kong Government Department of Health. After a mean follow-up of 4.1 years, 1848 male and 2035 female deaths occurred among 54,214 subjects (96.5% successful follow-up). At baseline, more men than women were current smokers (20.3% vs 4.0%) and former smokers (40.8% vs 7.9%). The adjusted RRs (95% CI) for all-cause mortality in former and current smokers, compared with never smokers, were 1.39 (1.23 to 1.56) and 1.75 (1.53 to 2.00) in men and 1.43 (1.25 to 1.64) and 1.38 (1.14 to 1.68) in women, respectively. For current smokers, the RRs (95% CI) for all-cause mortality were 1.59 (1.39 to 1.82), 1.72 (1.48 to 2.00) and 1.84 (1.43 to 2.35) for daily consumption of 1-9, 10-20 and > 21 cigarettes, respectively (p for trend <0.001). RRs (95% CI) were 1.49 (1.30 to 1.72) and 2.20 (1.88 to 2.57) in former and current smokers for all deaths from cancer, and 1.24 (1.04 to 1.47) and 1.57 (1.28 to 1.94) for all cardiovascular deaths, respectively. Quitters had significantly lower risks of death than current smokers from all causes, lung cancer, all cancers, stroke and all cardiovascular diseases. In old age, smoking continues to be a major cause of death, and quitting is beneficial. Smoking cessation is urgently needed in rapidly ageing populations in the East.
    Tobacco control 06/2007; 16(3):182-9. · 3.85 Impact Factor
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    ABSTRACT: Obesity is increasingly prevalent in both developed and developing areas. Although undernutrition is well associated with tuberculosis, few studies have systematically examined the association with obesity. Method A cohort of 42 116 individuals 65 years or older enrolled at 18 health centers for elderly patients in Hong Kong, China (which has a tuberculosis incidence of approximately 90 per 100,000 population), in 2000 were followed up prospectively through the territory-wide tuberculosis registry for the development of active tuberculosis from 3 months after enrollment until December 31, 2005, using the identity card number as the unique identifier. The association with body mass index (BMI; calculated as weight in kilograms divided by the square of height in meters), as categorized by the Asian standards, was assessed with the control of other baseline characteristics. Obese (BMI>or=30) and overweight (BMI, 25 to <30) individuals were at significantly lower risks of developing active tuberculosis than normal-weight individuals (BMI, 18.5 to <25), with hazard ratios (95% confidence intervals) of 0.36 (0.20-0.66) and 0.55 (0.44-0.70), respectively, after adjustment for baseline demographic, social, and clinical variables. An inverse linear association was observed predominantly for pulmonary but not extrapulmonary tuberculosis. This association persisted after controlling for potential confounders or excluding individuals with known tuberculosis risk factors. Obesity is associated with a lower risk of active pulmonary tuberculosis in the older population of Hong Kong. The presence of such a strong but selective association across the whole spectrum of BMI could have major biological, clinical, and/or epidemiological implications. Further studies are indicated to explore the underlying mechanisms, potential clinical utilities, and possible epidemiological consequences.
    Archives of Internal Medicine 06/2007; 167(12):1297-304. · 11.46 Impact Factor
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    ABSTRACT: Better childhood conditions, proxied by greater height, are usually protective against ischemic heart disease in western countries. These relations are less evident in other settings. We used multivariable logistic regression to examine the relation of height to the metabolic syndrome and its components in a rapidly developed Asian population using a representative, cross-sectional Hong Kong Chinese sample of 2860 adults from 1994 to 1996. Height was inversely associated with increased blood pressure (odds ratio = 0.74; 95% confidence interval = 0.58-0.94) and raised fasting plasma glucose (0.71; 0.55-0.91), but only after adjustment for central obesity. Central obesity was also positively associated with height (2.09; 1.67-2.62) for tallest compared with shortest tertile, confounding these relationships. The association between height and central obesity was much stronger in men than in women. The relation of height to cardiovascular risk may relate to a society's history and stage of socioeconomic development.
    Epidemiology 04/2007; 18(2):274-8. · 5.74 Impact Factor
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    ABSTRACT: The purpose of the study is to investigate the cross-sectional and prospective relation between workplace secondhand smoke (SHS) exposure and respiratory symptoms. Cross-sectional data for workplace SHS exposure and respiratory symptoms were collected by using random digit dialing from 7336 never-smoking Hong Kong workers 15 years or older in 1997 to 1998. In the 2000 to 2001 follow-up, 2213 workers who remained never smoking, had the same SHS exposure status, worked at the same job for at least 2 years, and were not exposed to SHS at home at follow-up were included for prospective analysis. Cross-sectionally, SHS was associated significantly with frequent colds, cough and phlegm, throat problems, and the presence of any respiratory symptoms with adjusted odds ratios of 1.89 (95% confidence interval [CI], 1.66-2.15), 1.65 (95% CI, 1.35-2.02), 1.88 (95% CI, 1.63-2.15), and 1.96 (95% CI, 1.75-2.20) at baseline, each having significant linear associations with duration of exposure. SHS was not associated with rhinitis. Prospectively, consistent SHS exposure increased the risk for cough and phlegm and any respiratory symptoms by 48% (12% to 97%) and 54% (13% to 109%), respectively. This first non-Western population-based prospective study shows that workplace SHS exposure is associated significantly with frequent respiratory symptoms, both cross-sectionally and prospectively, thus providing strong evidence that the association is causal.
    Annals of Epidemiology 03/2007; 17(2):126-31. · 2.48 Impact Factor
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    ABSTRACT: Cardiovascular risk equations are traditionally derived from the Framingham Study. The accuracy of this approach in Asian populations, where resources for risk factor measurement may be limited, is unclear. To compare "low-information" equations (derived using only age, systolic blood pressure, total cholesterol and smoking status) derived from the Framingham Study with those derived from the Asian cohorts, on the accuracy of cardiovascular risk prediction. Separate equations to predict the 8-year risk of a cardiovascular event were derived from Asian and Framingham cohorts. The performance of these equations, and a subsequently "recalibrated" Framingham equation, were evaluated among participants from independent Chinese cohorts. Six cohort studies from Japan, Korea and Singapore (Asian cohorts); six cohort studies from China; the Framingham Study from the US. 172,077 participants from the Asian cohorts; 25,682 participants from Chinese cohorts and 6053 participants from the Framingham Study. In the Chinese cohorts, 542 cardiovascular events occurred during 8 years of follow-up. Both the Asian cohorts and the Framingham equations discriminated cardiovascular risk well in the Chinese cohorts; the area under the receiver-operator characteristic curve was at least 0.75 for men and women. However, the Framingham risk equation systematically overestimated risk in the Chinese cohorts by an average of 276% among men and 102% among women. The corresponding average overestimation using the Asian cohorts equation was 11% and 10%, respectively. Recalibrating the Framingham risk equation using cardiovascular disease incidence from the non-Chinese Asian cohorts led to an overestimation of risk by an average of 4% in women and underestimation of risk by an average of 2% in men. A low-information Framingham cardiovascular risk prediction tool, which, when recalibrated with contemporary data, is likely to estimate future cardiovascular risk with similar accuracy in Asian populations as tools developed from data on local cohorts.
    Journal of Epidemiology &amp Community Health 03/2007; 61(2):115-21. · 3.39 Impact Factor
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    ABSTRACT: The aims of this study were to obtain the most recent representative data for the prevalence of diabetes in adult populations in the World Health Organisation's South-East Asia and Western Pacific regions and to quantify the contribution of diabetes to the burden of mortality from cardiovascular diseases in these regions. Previous reports indicate that there are 83 million individuals with diabetes in the Asia-Pacific region, but since many of the country-specific estimates were not from nationally representative studies, this figure may not accurately reflect the current burden of diabetes. Information on the prevalence of diabetes was obtained by searching Medline and government health websites. Data were available from 12 countries representing 78% of the total population of the Asia-Pacific region. Six of 10 countries with complete data reported a prevalence of diabetes exceeding those estimates currently cited by the World Health Organization; three of which have also already exceeded the World Health Organization projections for 2030. In the 12 countries in the region with nationally representative data, the prevalence of diabetes ranged from 2.6% to 15.1%. Hazard ratios from the Asia Pacific Cohort Studies Collaboration were used to calculate population attributable fractions for diabetes for fatal cardiovascular diseases in the region. Population attributable fractions ranged from 2% to 12% for coronary heart disease, 1% to 6% for haemorrhagic stroke, and 2% to 11% for ischaemic stroke. Accurate estimates of the prevalence of diabetes are of great importance and standard methods are needed for periodic surveillance across the Asia-Pacific region and elsewhere.
    Asia Pacific Journal of Clinical Nutrition 02/2007; 16(1):187-92. · 1.06 Impact Factor
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    ABSTRACT: About half of the world's burden of cardiovascular disease is carried by countries in the Asia-Pacific region. This study aimed to quantify the contribution of hypertension to cardiovascular diseases (CVD) at the country level, by calculating the sex-specific, population-attributable fractions (PAFs) for fatal ischaemic heart disease (IHD) and stroke (haemorrhagic and ischaemic) for the World Health Organization Western Pacific and South-east Asian regions. The most recent sex-specific prevalence data on hypertension were sought. Age-adjusted hazard ratio (HR) estimates for fatal IHD and stroke associated with hypertension were obtained using Cox analyses of individual participant cohort data from 600,000 adult participants in the Asia-Pacific Cohort Studies Collaboration. HR estimates and prevalence were then used to calculate sex-specific PAFs for fatal IHD and stroke, by country. In 15 countries with available data, the prevalence of hypertension ranged from 5-47% in men and from 7-38% in women. Overall, the fraction of IHD attributable to hypertension ranged from 4-28% in men and from 8-39% in women. Corresponding ranges for haemorrhagic stroke were 18-66% and 15-49%, and for ischaemic stroke were 8-44% and 12-45%. In the Asia-Pacific region, up to 66% of some subtypes of CVD can be attributed to hypertension, underscoring the immense impact that blood pressure- lowering strategies could have in this populous region.
    Journal of Hypertension 02/2007; 25(1):73-9. · 4.22 Impact Factor
  • Heart Lung and Circulation - HEART LUNG CIRC. 01/2007; 16.
  • Early Human Development - EARLY HUM DEV. 01/2007; 83.
  • Early Human Development - EARLY HUM DEV. 01/2007; 83.
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    ABSTRACT: Sex differences in lipids and body shape, but not diabetes, increase at puberty. Hong Kong Chinese are mainly first or second generation migrants from China, who have shared an economically developed environment for years, but grew up in very different environments in Hong Kong or contemporaneously undeveloped Guangdong, China. We assessed if environment during growth had sex-specific associations with lipids and body shape, but not diabetes. We used multivariable regression in a population-based cross-sectional study, undertaken from 1994 to 1996, of 2537 Hong Kong Chinese residents aged 25 to 74 years with clinical measurements of ischaemic heart disease (IHD) risk, including HDL-cholesterol, ApoB, diabetes and obesity. Waist-hip ratio was higher (mean difference 0.01, 95% CI 0.001 to 0.02) in men, who had grown up in an economically developed rather than undeveloped environment, as was apolipoprotein B (0.05 g/L, 95% CI 0.001 to 0.10), adjusted for age, socio-economic status and lifestyle. In contrast, the same comparison was associated in women with lower waist-hip ratio (-0.01, 95% CI -0.001 to -0.02) and higher HDL-cholesterol (0.05 mmol/L, 95% CI 0.0004 to 0.10). The associations in men and women were significantly different (p-values<0.001). There were no such differences for diabetes. Growth in a developed environment with improved nutrition may promote higher sex-steroids at puberty producing an atherogenic lipid profile and male fat pattern in men but the opposite in women, with tracking of increased male IHD risk into adult life.
    PLoS ONE 01/2007; 2(10):e1070. · 3.73 Impact Factor

Publication Stats

7k Citations
2,084.87 Total Impact Points


  • 1982–2014
    • The University of Hong Kong
      • • School of Public Health
      • • Department of Paediatrics and Adolescent Medicine
      • • Department of Community Medicine
      Hong Kong, Hong Kong
  • 2013
    • Worcestershire Acute Hospitals NHS Trust
      Worcester, England, United Kingdom
    • University of Glasgow
      • West of Scotland Cancer Surveillance Unit
      Glasgow, Scotland, United Kingdom
  • 2006–2013
    • The George Institute for Global Health
      Sydney, New South Wales, Australia
  • 1995–2013
    • University of Birmingham
      • Department of Public Health, Epidemiology and Biostatistics
      Birmingham, England, United Kingdom
  • 2012
    • University of Texas Southwestern Medical Center
      Dallas, Texas, United States
    • University of Ottawa
      Ottawa, Ontario, Canada
    • Universität Heidelberg
      • Faculty of Medicine Mannheim and Clinic Mannheim
      Heidelberg, Baden-Wuerttemberg, Germany
    • Lands Department of The Government of the Hong Kong Special Administrative Region
      Hong Kong, Hong Kong
  • 2004–2012
    • University of Sydney
      • George Institute for Global Health
      Sydney, New South Wales, Australia
  • 2011
    • London School of Hygiene and Tropical Medicine
      Londinium, England, United Kingdom
    • University of Minnesota Twin Cities
      • Division of Epidemiology and Community Health
      Minneapolis, MN, United States
  • 1997–2011
    • The Chinese University of Hong Kong
      • Department of Medicine and Therapeutics
      Hong Kong, Hong Kong
  • 2010
    • University of Oslo
      • Department of Biostatistics
      Oslo, Oslo, Norway
    • University of Groningen
      • Department of Epidemiology
      Groningen, Province of Groningen, Netherlands
  • 2009
    • Medical Research Council (UK)
      Londinium, England, United Kingdom
  • 2008–2009
    • Chinese PLA General Hospital (301 Hospital)
      Peping, Beijing, China
    • Hong Kong SAR Government
      Hong Kong, Hong Kong
  • 2003–2006
    • Queen Mary Hospital
      Hong Kong, Hong Kong
    • Isfahan University of Medical Sciences
      • Epidemiology and Biostatistics Department
      Eşfahān, Ostan-e Esfahan, Iran
  • 2004–2005
    • Imperial College London
      • Department of Infectious Disease Epidemiology
      London, ENG, United Kingdom
  • 2001–2005
    • The Hong Kong Polytechnic University
      • • School of Nursing
      • • Department of Rehabilitation Sciences
      Hong Kong, Hong Kong
  • 2000–2002
    • The University of Hong Kong - Shenzen Hospital
      Hong Kong, Hong Kong
    • Chongqing University of Medical Science
      Ch’ung-ch’ing-shih, Chongqing Shi, China
  • 1998
    • The University of Sheffield
      Sheffield, England, United Kingdom
  • 1988–1990
    • Caritas Medical Centre
      Hong Kong, Hong Kong
  • 1989
    • Christian Hospital
      Saint Louis, Michigan, United States