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Research Article
Evaluation of Kinesiophobia and Its Correlations with Pain
and Fatigue in Joint Hypermobility Syndrome/Ehlers-Danlos
Syndrome Hypermobility Type
Claudia Celletti,1Marco Castori,2Giuseppe La Torre,3and Filippo Camerota1
1Physical Medicine and Rehabilitation, Department of Orthopaedics, Sapienza University, Umberto I Hospital,
Piazzale Aldo Moro 3, 00185 Rome, Italy
2Medical Genetics, Department of Molecular Medicine, Sapienza University, San Camillo-Forlanini Hospital, 00151 Rome, Italy
3Department of Public Health and Infectious Diseases, Sapienza University, Umberto I Hospital, 00185 Rome, Italy
Correspondence should be addressed to Claudia Celletti; c celletti@libero.it
Received April ; Accepted June
Academic Editor: Liam McGun
Copyright © Claudia Celletti et al. is is an open access article distributed under the Creative Commons Attribution License,
which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Ehlers-Danlos syndrome hypermobility type a. k. a. joint hypermobility syndrome (JHS/EDS-HT) is a hereditary musculoskeletal
disorder associating generalized joint hypermobility with chronic pain. Anecdotal reports suggest a prominent role for
kinesiophobia in disease manifestations, but no study has systematically addressed this point. Objective.Toinvestigatethe
impact of kinesiophobia and its relationship with pain, fatigue, and quality of life in JHS/EDS-HT. Design. Cross-sectional study.
Subjects/Patients. patients ( female and male) with JHS/EDS-HT diagnosis following standardized diagnostic criteria were
selected. Methods. Disease features were analyzed by means of specic questionnaires and scales evaluating kinesiophobia, pain,
fatigue, and quality of life. e relationships among variables were investigated using the Spearman bivariate analysis. Results.
Kinesiophobia resulted predominantly in the patients’ sample. e values of kinesiophobia did not correlate with intensity of pain,
quality of life, and (or) the single component of fatigue. A strong correlation was discovered between kinesiophobia and general
severity of fatigue. Conclusions. In JHS/EDS-HT, the onset of pain-avoiding strategies is related to the presence of pain but not to
its intensity. e clear-cut correlation between kinesiophobia and severity of fatigue suggests a direct link between musculoskeletal
pain and fatigue. In JHS/EDS-HT, the underlying mechanism is likely to be facilitated by primary disease characteristics, including
hypotonia.
1. Introduction
Ehlers-Danlos syndrome (EDS) is an umbrella term for
various hereditary connective tissue disorders (HCTDs)
mainly characterized by congenital joint hypermobility, skin
hyperextensibility,andtissuefragility.Amongthesixmajor
forms [], the classic and the hypermobility (EDS-HT) types
areconsideredthemostcommon.EDS-HTtypicallyfeatures
joint laxity and related complications, chronic/recurrent limb
pain, and minor skin involvement [], although its extended
clinical spectrum covers a wide variety of functional somatic
syndromes []. An international panel of experts now con-
siders EDS-HT one and the same as joint hypermobility
syndrome (JHS) [], and this overlap is particularly evident
in adulthood. e diagnosis of JHS/EDS-HT still remains
unsupported by molecular testing, with the exception of a
very few cases purportedly mutated in COL3A1 and TNXB
[–]. More recently, the relevance of previous molecular
ndings has been further reduced by the separation of
patients mutated in TNXB, who are now grouped under a
distinct EDS subtype (i.e., TNXB-decient EDS) []. At the
moment, recognition of JHS/EDS-HI is uniquely based on
clinical diagnostic criteria [,], which needs urgent revision
[].
Pain and fatigue are considered relevant determinants
of disability in JHS/EDS-HT []. However, their manifes-
tations and pathophysiology remain poorly characterized.
Accumulated data demonstrate that pain is oen chronic
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and widespread in EDS [] and associates positively with
residual joint hypermobility, dislocations, previous surgery,
and low nocturnal sleep quality []. Limb pain, though
considered originating mostly from primary joint damage,
shows some neuropathic features in ∼/ patients []. Such
preliminary ndings anticipate a complex pathophysiology
for pain in JHS/EDS-HT, in which cognitive aspects are likely
tostronglyaectqualityoflife.Accordingly,Rombautetal.
[] commonly encountered fear of falling among women
with JHS/EDS-HT.
Chronic musculoskeletal conditions, predominantly
characterized by chronic pain, are oen associated with fear
[]. Fear is the emotional reaction to a specic, identiable,
and immediate threat, such as a dangerous animal or injury
[]. Pain-related fear can be dened as the fear that emerges
when stimuli that are related to pain are perceived as a
main threat []. Fear in relation to pain is described in
three constructs: pain-related fear, fear of movement, and
kinesiophobia []. Kinesiophobia is the most extreme
form of fear of movement, and is dened as an excessive,
irrational and debilitating fear of physical movement and
activity resulting from a feeling of vulnerability to painful
injury or reinjury, and it has been reported as a common
feature of patients with CFS [], bromyalgia, and chronic
low back pain []. Fear-avoidance is said to play a role in
the so-called deconditioning syndrome which can either
be expressed in a weakened muscle strength, or disordered
muscle coordination, during physical activity [].
In this study, we carried out a questionnaire on
JHS/EDS-HT patients in order to evaluate the presence and
severity of kinesiophobia and to analyze its relationship with
pain, fatigue, and quality of life (QoL). Implications of the
results in the treatment of JHS/EDS-HT are discussed below.
2. Patients and Methods
2.1. Patient Selection. All patients studied have attended
a multidisciplinary service dedicated to HCTDs and were
followed into the “joint hypermobility” outpatient clinic in
the Division of Physical Medicine and Rehabilitation of the
Umberto I University Hospital (Rome, Italy) and into the
clinical genetics outpatient clinic at the Medical Genetics of
the San Camillo-Forlanini Hospital (Rome, Italy). Diagnosis
was based on published diagnostic criteria including the
Brighton criteria for JHS [] and the Villefranche criteria
for EDS-HT []. Patients were included if they met at least
oneofthesetwosets.Inourclinicalpractice,theBrighton
criteria are the most stringent for young-adult, adult, and
elderly patients, while the Villefranche criteria are the best
for individuals in the pediatric age group. For this study,
JHM was mainly assessed applying the Beighton score [].
Further joint or group of joints were equally evaluated
although, at the moment, their status do not inuence
diagnosis establishment. e Beighton score is a -point
evaluation with attribution of one point in the presence of any
ofthefollowingfeatures:(a)passiveappositionofthethumb
to the exor aspect of the forearm (one point for each hand),
(b) passive dorsiexion of the V nger beyond ∘(one point
T : General characteristics.
Characteristic Frequency
(total = ) %
Gender (female/male) / ./.
Positive family history .
Contortionism in pediatric age .
Motor delay/clumsiness .
Residual joint hypermobility (Beighton ≥) .
Recurrent (≥) joint dislocations .
Recurrent (≥) so tissue lesions .
Chronic back pain .
Chronic arthralgias .
Chronic myalgias .
Chronic fatigue .
Recurrent headaches .
Unrefreshing sleep .
Impaired memory/concentration .
Velvety/sm o o t h s k i n .
Hyperextensible skin .
Easy bruising .
Eyelid ptosis .
Varicose veins/hemorrhoids .
Hernias .
Uterine/vesical/rectal prolapse .
for each hand), (c) hyperextension of the elbow beyond 10∘
(one point for each arm), (d) hyperextension of the knee
beyond 10∘(one point for each leg), and (e) forward exion of
the trunk with the knees extended and the palms resting at
on the oor. Skin/supercial connective tissue features were
assessed qualitatively on the basis of accumulated experience
by palpation and gentle stretching of the skin at the volar
aspect of the palm (at the IV metacarpal) and/or of the
forearm. Other HCTDs were excluded clinically. Patients
were also evaluated to search other secondary symptoms of
the pathology that are showed in Tab l e .Individualswith
incomplete diagnosis were equally excluded. us, a group
of patients with insucient features of JHS for a rm clinical
diagnosis based on the available diagnostic criteria, but likely
to be liable to develop full-blown JHS, were not included
in this study. Pregnant women and patients older than ,
or younger than , were not included in order to better
homogenize the sample.
2.2. Evaluation Tools. In order to evaluate kinesiophobia,
pain, and fatigue, all patients were asked to ll in a series
of questionnaires including the Tampa Scale Italian version
(TSK-I) [], the Fatigue Severity Scale (FSS) [], the
Multidimensional Fatigue Inventory Scale (MFI-) [], and
the Numeric Rating Scale (NRS-) for pain []. Data were
also compared with quality of life, which was evaluated by the
Medical Outcome Study Short Form- (SF-) [].
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2.2.1. Kinesiophobia. TSK-I is the most widely used question-
naire to assess pain and pain-related fear of movement in
subjects with musculoskeletal complaints [,], and this
hasbeentranslatedintoandvalidatedindierentlanguages
including Italian []. TSK-I is divided into two sub-scales:
evaluating activity avoidance (TSK-AA: a belief that activities
causingpainshouldbeavoided)andharm (TSK-H: a belief
that pain is a sign of bodily damage), respectively. TSK-I is
able to distinguish the fear of movement domain from other
conceptual domains such as pain and functional alteration.
e original version of the TSK-I questionnaire comprises
items to assess the subjective rating of kinesiophobia [].
Each item has a four-point Likert scale with scoring alter-
natives ranging from “strongly disagree” to “strongly agree.”
A total sum is calculated aer inversion of the individual
scores of items , , , and . e total score ranges between
and . A high TSK-I value indicates a high degree of
kinesiophobia. In the Italian version [],items,,,and
wereexcludedwithatotalscoreofandamaximumscore
for activity avoidance and harm of and , respectively.
2.2.2. Fatigue. FSS is a scale quantifying fatigue intensity,
which has been used in dierent chronic conditions, such as
multiple sclerosis and systemic lupus erythematosus [], and
shows high internal consistency and validity. FSS comprises
items with a -point response format that indicates the
degree of agreement with each statement []. MFI- is a -
item self-reporting instrument designed to measure fatigue
[]. It covers the following dimensions: general fatigue (GF),
physical fatigue (PF), mental fatigue (MF), reduced motiva-
tion (RM), and reduced activity (RA). e questionnaire is
constructed with an equal number of questions for each of the
ve suggested dimensions. It has been demonstrated that it is
reliable and valid and has been tested in various conditions,
such as cancer or chronic fatigued patients [].
2.2.3. Pain. NRS is a rapid-to-administrate -point numeric
scale used to roughly measure any kind of pain with a score
ranging from (no pain) to (acute pain).
2.2.4. Quality of Life. e Medical Outcome Study -item
Short-Form Health Survey (SF-) is a multipurpose, short
form health survey to evaluate aspects of health most closely
related to quality of life with questions that measure
conceptual domains: physical functioning, physical limita-
tion, bodily pain, general health, vitality, social functioning,
emotional limitation, and mental health. e raw scores in
each domain are transformed into to scale with higher
scores indicating better quality of life []. e questionnaire
has been translated into Italian and thoroughly validated in
the Italian context [].
2.3. Statistical Analysis. Statistical analysis was conducted
with the SPSS soware package for Windows, version ..
e Kolmogorov-Smirnov probability test was used to assess
thenormalityofthedistributions.eFSSmeanscore
was compared with normal healthy adult scores extracted
from Krupp et al. []usingtheonesamplet-test. SF-
T : Rough data of the Beighton score, TSK-I, MFI-, FSS,
NRS (pain), and FS-.
Variabl e Me an ±SD (range)
Beighton score 5.47 ± 1.97 (–)
TSK-I 34.40 ± 5.85 (–)
TSK-AA 15.52 ± 3.48 (–)
TSK-H 18.88 ± 3.26 (–)
MFI-, GF 17.59 ± 3.12 (–)
MFI-, PF 16.90 ± 2.86 (–)
MFI-, RA 14.33 ± 4.04 (–)
MFI-, RM 12.71 ± 2.54 (–)
MFI-, MF 14.26 ± 4.64 (–)
FSS 5.42 ± 1.77 (–)
NRS (pain) 7.09 ± 1.49 (–)
SF-, PF 45.23 ± 25.42 (–)
SF-, RP 17.26 ± 26.18 (–)
SF-, BP 25.91 ± 21.73 (–)
SF-, GH 26.45 ± 16.30 (–)
SF-, VT 30.11 ± 20.01 (–)
SF-, SF 38.39 ± 25.66 (–)
SF-, RE 43.88 ± 40.43 (–)
SF-, MH 55.52 ± 23.77 (–)
BP: bodily pain; FSS: Fatigue Severity Scale; GF: general fatigue; GH: general
health; MF: mental fatigue; MFI: Multidimensional Fatigue Inventory; MH:
mental health; NRS: Numeric Rating Scale; PF (SF-): physical functioning;
PF (MFI-): physical fatigue; RA: reduced activity; RE: role-emotional; RM:
reduced motivation; RP: role-physical; SF: social functioning; SF-: short
form ; TSK-AA: Tampa Scale activity avoidance; TSK-H: Tampa Scale
harm; TSK-I: Tampa Scale total score; VT: vitality.
scores were compared with a sample of the normal Italian
population []usingtheonesamplet-test.
e Spearman bivariation analysis was conducted in
order to test independent variables related to dependent
ones. Variables assumed as independent included age, sex,
Beighton scores, FSS mean scores, the four subscores of MFI-
, the NRS mean scores, and the SF- in all subforms,
while TSK-I, TSK-AA, and TSK-H scores were considered
dependent variables. Subsequently, a separate multivariate
linear regression analysis was performed for TSK-I, TSK-
AA, and TSK-H as dependent variables, using the Backward
elimination stepwise method and including only indepen-
dent variables that show 𝑃 < 0.250 at the univariate analyses.
e signicance level was set at 𝑃 < 0.05.
3. Results
Forty-two patients ( females and males; mean age at
evaluation: . ±. years) were selected. Clinical char-
acteristics of the patient samples are summarized in Tabl e .
Table illustrates numerical values of the following variables
used for further statistical analysis: Beighton score, TSK-I,
FSS, MFI-, NRS (pain), and SF-. In the patient popula-
tion, the mean score of TSK-I and its sub-scales (TSK-AA and
TSK-H) were higher than the value previously xed as the
cut o for establishing the presence of fear of movement [],
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T : Results of the Spearman bivariation analysis comparing TSK-I, TSK-AA, and TSK-H values (as dependent variables) with dierent
variables.
Variable TSK-I TSK-AA TSK-H
Age −. (𝑃 = 0.62)−. (𝑃 = 0.088) . (𝑃 = 0.356)
Beighton score −. (𝑃 = 0.67) . (𝑃 = 0.889)−. (𝑃 = 0.49)
NRS . (𝑃 = 0.93) . (𝑃 = 0.667) . (𝑃 = 0.973)
FSS . (P<0.001) . (P<0.001) . (P=0.01)
MFI-, GF . (P=0.037) . (P=0.02) . (𝑃 = 0.15)
MFI-, PF . (𝑃 = 0.06) . (P=0.03) . (𝑃 = 0.18)
MFI-, RA . (𝑃 = 0.14) . (P=0.01) . (𝑃 = 0.68)
MFI-, RM . (𝑃 = 0.72)−. (𝑃 = 0.888) . (𝑃 = 0.24)
MFI-, MF . (P=0.004) . (P=0.001) . (𝑃 = 0.11)
SF-, PF −. (𝑃 = 0.23)−. (𝑃 = 0.22)−. (𝑃 = 0.41)
SF-, RP −. (𝑃 = 0.28)−. (𝑃 = 0.25)−. (𝑃 = 0.48)
SF-, BP −. (𝑃 = 0.51)−. (𝑃 = 0.66)−. (𝑃 = 0.49)
SF-, GH −. (𝑃 = 0.76)−. (𝑃 = 0.31) . (𝑃 = 0.58)
SF-, VT −. (P=0.03)−. (𝑃 = 0.06)−. (𝑃 = 0.08)
SF-, SF −. (𝑃 = 0.15)−. (𝑃 = 0.17)−. (𝑃 = 0.28)
SF-, RE −. (𝑃 = 0.49)−. (𝑃 = 0.20) . (𝑃 = 0.89)
SF-, MH −. (P=0.01)−. (P=0.02)−. (𝑃 = 0.05)
Signicant 𝑃values are in bold.
BP: bodily pain; FSS: fatigue severity scale; GF: general fatigue; GH: general health; MF: mental fatigue; MFI: multimensional fatigue inventory; MH: mental
health; NRS: numeric rating scale; PF (SF-): physical functioning; PF (MFI-): physical fatigue; RA: reduced activity; RE: role-emotional; RM: reduced
motivation; RP: role-physical; SF: social func tioning; SF-: short form ; TSK-AA: Tampa Scale activity avoidance; TSK-H: Tampa Scale harm; TSK-I: Tampa
Scale total score; VT: vitality.
T : Multivariate linear regression analysis using the Backward elimination stepwise method.
Variable TSK-I TSK-AA TSK-H
Age −. (𝑃 = 0.43)−. (𝑃 = 0.08) . (𝑃 = 0.499)
Sex . (𝑃 = 0.825) . (𝑃 = 0.592)−. (𝑃 = 0.789)
FSS . (P<0.01) . (P=0.000) . (P=0.001)
MFI-, GF −. (𝑃 = 0.81)−. (𝑃 = 0.670)−. (𝑃 = 0.858)
MFI-, PF . (𝑃 = 0.679) . (𝑃 = 0.685) . (𝑃 = 0.90)
MFI-, RA −. (𝑃 = 0.819) . (𝑃 = 0.231)−. (𝑃 = 0.159)
MFI-, MF . (𝑃 = 0.84) . (𝑃 = 0.550)−. (𝑃 = 0.820)
SF-, MH −. (𝑃 = 0.20)−. (𝑃 = 0.32)−. (𝑃 = 0.30)
SF-, VT −. (𝑃 = 0.89) . (𝑃 = 0.085)−. (𝑃 = 0.53)
𝑅2of the model . . .
Signicant 𝑃values are in bold.
FSS: fatigue severity scale; GF: general fatigue; MF: mental fatigue; MFI: multimensional fatigue inventory; MH: mental health; PF: physicalfatigue; RA: reduced
activity;SF-:shortform;TSK-AA:TampaScaleactivityavoidance;TSK-H:TampaScaleharm;TSK-I:TampaScaletotalscore;VT:vitality.
with the % of patients with high score values. FSS and FS-
and all its domains were compared with those previously
registered in the general population [,]. All values
were higher in the patient samples with a signicance of
𝑃 < 0.001. Results of the Spearman bivariation analysis
comparing the TSK-I, TSK-AA, and TSK-H values with
theselectedvariablesaresummarizedinTable .Tabl e
shows results of the multivariate linear regression analysis
by the Backward elimination stepwise method. e most
consistent association was the one between TSK-I (including
both domains) and FSS (Figure ). Association between TSK-
I and some MFI- domains appeared weaker, though still
statistically signicant in relation to the Spearman bivariation
analysis.
4. Discussion
Pain-related fear is a particular characteristic of patients with
musculoskeletal disorders []andplaysanimportantrolein
explaining disability and in transition from acute to chronic
musculoskeletal pain []. From this perspective, kinesio-
phobia (i.e., cognitive fear of movement or reinjury) can
lead to the stopping/reduction of various activities thought
BioMed Research International
TSK-I
45
40
35
30
25
20
15
1234567
FSS
R2linear = 0.367
(a)
TSK-AA
25
20
15
10
5
1234567
FSS
R2linear = 0.297
(b)
TSK-H
25
20
15
10
5
1234567
FSS
R2linear = 0.253
(c)
F : Correlation between Fatigue Severity Scale (FSS) and kinesiophobia as total score TSK-I (a) and in the activity avoidance TSK-AA
(b) and in the harm TSK-H (c) subscales.
to generate pain with progressive limitation of mobility in
some individuals. e consequent disuse and deconditioning
generatefurtherlossofmuscletone,exibility,andaerobic
capacity, which may explain (bearing in mind the population
under consideration) the transition to the third disease
phase in JHS/EDS-HT [,]symptomprogression.In
this phase, psychological and physical disability is marked
with many patients suering from anxiety, depression, and
somatosensory amplication [] and some obliged to use a
wheelchair.
Overall, the present study, conducted through a ques-
tionnaire-based investigation into patients, in which there
is a preponderance of females described as characteris-
tic in JHS/EDS-HT even if the mechanism underlying is
unknown [], conrmed the hypothesis that kinesiophobia
is a common symptom in JHS/EDS-HT. We also conrmed
global deterioration of the QoL, moderate/severe bodily pain
and marked fatigue in our patient cohort. Since pain and
fatigue have previously been proposed as relevant factors
determining disability in JHS/EDS-HT [], we tried to
compare the severity of kinesiophobia with the QoL, intensity
of pain and fatigue. Although the bivariate analysis identied
a series of possible correlations (Ta b l e ), further rening by
multivariate linear regression analysis (Ta b l e )conrmed
correlation with only general severity of fatigue (i.e., FSS).
Lack of correlation with intensity of pain suggests an intrigu-
ing relationship between kinesiophobia and pathophysiology
of chronic pain in JHS/EDS-HT. In fact, one could expect
that the impact of pain-avoiding strategies is directly linked
to the intensity of perceived pain. is does not hold true in
our sample, where the onset of kinesiophobia is inuenced
by the presence of pain, but not by its severity. erefore, in
JHS/EDS-HT, it is plausible that individual coping strategies
are more relevant than the intensity and/or frequency of the
pain stimulus in generating the psychological and physical
disability related to pain-avoiding behaviours.
BioMed Research International
Conversely, kinesiophobia strongly relates with severity
of fatigue, but not its single components in our sample.
Such a result suggests a direct link between adoption of
pain-avoiding strategies and chronic fatigue. Accordingly, it
could be hypothesized that kinesiophobia may contribute to
the progression and, perhaps, onset of fatigue by bodily disuse
secondary to decreased physical eort. erefore, a three-
phase model of pain-kinesiophobia-fatiguecanbeproposed
by which, in predisposed individuals, repeated musculoskele-
tal traumatism exacerbated by joint hypermobility generates
pain-avoiding strategies, which, in turn, cause/aggravate
fatigue. is mechanism, which may be considered acting in
many chronic pain conditions, appears more pronounced in
JHS/EDS-HT, as hypotonia and hypermobility are primary
features of the disease, and the eects of pain-avoiding
strategies are likely to appear more rapidly and to be more
severe. Recent nding that muscle weakness is associated
with fatigue in EDS is in line with this assumption [].
However, this model of pain-kinesiophobia-fatigue cannot
explain the entire spectrum of clinical variability in JHS/EDS-
HT. In fact, by tracing its natural history, the onset of fatigue
could be independent of joint instability complications and
limb pain, at least in some cases []. e reason why,
in our sample, kinesiophobia does not correlate with QoL
remains unexplained. is probably reects that QoL tools,
such as the SF-, measure multidimensional variables that
are not limited to disability only. Consequently, the eects
that kinesiophobia hasonthemaretoosmalltobestatistically
signicant.
is study demonstrates once more the urgent need
for evaluating and treating JHS/EDS-HT patients within
multidisciplinary teams comprising a variety of specialists
(who can focus on pain and fatigue) including physiatrists,
physical and occupational therapists, clinical psychologists,
neuropsychologists, pain specialists, and rheumatologists. In
fact, the classic approach of treating JHS/EDS-HT-related
pain based on a combination of physical therapy and adjuvant
pharmacologic support should be associated with and, hope-
fully, substituted, at least in terms of prevention, by regular
physical exercise and cognitive therapies. Various studies
have demonstrated that exercise and tness are benecial in
a biomedical sense of maturation, strengthening, and healing
of bones, tendons, and muscle, while deconditioning refers to
a progressive process of worsening physical tness as reduced
muscular activity []. In JHS/EDS-HT, in particular, doing
moderate and continuous physical activity seems to be useful
in order to keep joint hypermobility and muscle tone, and to
reduce pain, fatigue, and fear of movement.
An individualized, modied, and therapeutic programme
involving a multidisciplinary team is recommended to pre-
vent chronic pain and deconditioning and thereby reduce
suering in JHS/EDS-HT patients.
Conflict of Interests
e authors declare that no conict of interests exists con-
cerning this paper and no nancial support or other benets
are correlated to this work.
Acknowledgments
e authors would like to thank Ellen M. A. Smets and Marco
Monticone for their cooperation in revising this paper.
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