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Li HH, Wang XF, Wang B, Jia FY. Vitamin D3 improves iminodipropionitrile-induced tic-like behavior in rats through regulation of GDNF/c-Ret signaling activity. Eur Child Adolesc Psychiatry 2024; 33:3189-3201. [PMID: 38396228 DOI: 10.1007/s00787-024-02376-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Accepted: 01/08/2024] [Indexed: 02/25/2024]
Abstract
Children with chronic tic disorders (CTD), including Tourette syndrome (TS), have significantly reduced serum 25-hydroxyvitamin D [25(OH)D]. While vitamin D3 supplementation (VDS) may reduce tic symptoms in these children, its mechanism is unclear. The study aim was to investigate the effects and mechanisms of vitamin D deficiency (VDD) and VDS on TS model behavior. Forty 5-week-old male Sprague-Dawley rats were randomly divided into (n = 10 each): control, TS model, TS model with VDD (TS + VDD), or TS model with VDS (TS + VDS; two intramuscular injections of 20,000 IU/200 g) groups. The VDD model was diet-induced (0 IU vitamin D/kg); the TS model was iminodipropionitrile (IDPN)-induced. All groups were tested for behavior, serum and striatal 25(OH)D and dopamine (DA), mRNA expressions of vitamin D receptor (VDR), glial cell line-derived neurotrophic factor (GDNF), protooncogene tyrosine-protein kinase receptor Ret (c-Ret), and DA D1 (DRD1) and D2 (DRD2) receptor genes in the striatum. TS + VDD had higher behavior activity scores throughout, and higher total behavior score at day 21 compared with TS model. In contrast, day 21 TS + VDS stereotyped behavior scores and total scores were lower than TS model. The serum 25(OH)D in TS + VDD was < 20 ng/mL, and lower than control. Striatal DA of TS was lower than control. Compared with TS model, striatal DA of TS + VDD was lower, while in TS + VDS it was higher than TS model. Furthermore, mRNA expression of VDR, GDNF, and c-Ret genes decreased in TS model, and GDNF expression decreased more in TS + VDD, while TS + VDS had higher GDNF and c-Ret expressions. VDD aggravates, and VDS ameliorates tic-like behavior in an IDPN-induced model. VDS may upregulate GDNF/c-Ret signaling activity through VDR, reversing the striatal DA decrease and alleviating tic-like behavior.
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Affiliation(s)
- Hong-Hua Li
- Department of Developmental and Behavioral Pediatrics, Children's Hospital, The First Hospital of Jilin University, Changchun, Jilin, 130021, China
- School of Public Health, Jilin University, Changchun, Jilin Province, China
- The Child Health Clinical Research Center of Jilin Province, Changchun, China
| | - Xi-Fei Wang
- Department of Developmental and Behavioral Pediatrics, Children's Hospital, The First Hospital of Jilin University, Changchun, Jilin, 130021, China
- The Child Health Clinical Research Center of Jilin Province, Changchun, China
| | - Bing Wang
- Department of Developmental and Behavioral Pediatrics, Children's Hospital, The First Hospital of Jilin University, Changchun, Jilin, 130021, China
- The Child Health Clinical Research Center of Jilin Province, Changchun, China
| | - Fei-Yong Jia
- Department of Developmental and Behavioral Pediatrics, Children's Hospital, The First Hospital of Jilin University, Changchun, Jilin, 130021, China.
- The Child Health Clinical Research Center of Jilin Province, Changchun, China.
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Wang CX, Wang B, Sun JJ, Xiao CY, Ma H, Jia FY, Li HH. Circulating retinol and 25(OH)D contents and their association with symptoms in children with chronic tic disorders. Eur Child Adolesc Psychiatry 2024; 33:1017-1028. [PMID: 37166521 PMCID: PMC11032271 DOI: 10.1007/s00787-023-02226-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Accepted: 05/04/2023] [Indexed: 05/12/2023]
Abstract
The present study measured serum levels of vitamin A (VA) and vitamin D (VD) in children with chronic tic disorders (CTD) and investigated their potential association with CTD and comorbidity of attention deficit hyperactivity disorder (ADHD) and the association of their co-insufficiencies or deficiencies with CTD symptoms. A total of 176 children (131 boys and 45 girls, median age of 9 years) with CTD were recruited as the CTD group. During the same period, 154 healthy children were selected as the healthy control (HC) cohort. Circulating retinol and 25-hydroxyvitamin D (25[OH]D) levels were measured for all participants using high-performance liquid chromatography (HPLC) and tandem mass spectrometry. The Yale Global Tic Severity Scale (YGTSS) was employed for the assessment of tic status and CTD impairment. The Swanson, Nolan, and Pelham Rating Scale (SNAP-IV) and the Children's Yale-Brown Obsessive-Compulsive Scale (CY-BOCS) were used to evaluate comorbidity symptoms. CTD pediatric participants exhibited markedly diminished circulating retinol and 25(OH)D levels compared to HCs. Moreover, VA and VD deficiencies and their co-insufficiencies/deficiencies were more prevalent in CTD participants than HCs. Circulating 25(OH)D levels were inversely proportional to the YGTSS motor tic scores. YGTSS scores in CTD children with only VA or VD insufficiency or deficiency or with VA and VD co-insufficiency/deficiency did not differ from those in CTD children with normal VA and VD. CTD children with comorbid ADHD displayed reduced circulating retinol and 25(OH)D concentrations and elevated prevalence of VD deficiency compared to CTD participants without comorbid ADHD. Lower serum retinol content was intricately linked to the presence of elevated CTD and comorbid ADHD. VA and VD deficiencies and their co-insufficiencies/deficiencies were markedly enhanced in CTD pediatric participants compared to HCs. Lower VA concentration was linked to the presence of enhanced CTD and comorbid ADHD. Therefore, children with CTD, especially with comorbid ADHD, may be at a higher risk of VA or VD deficiency, which may prompt the clinicians to consider whether blood tests for VA and VD in CTD children would be helpful for clinical care.
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Affiliation(s)
- Cheng-Xin Wang
- Department of Developmental and Behavioral Pediatrics, The First Hospital of Jilin University, Changchun, 130021, Jilin, China
- Department of Laboratory Medicine, The First Hospital of Jilin University, Changchun, 130021, China
| | - Bing Wang
- Department of Developmental and Behavioral Pediatrics, The First Hospital of Jilin University, Changchun, 130021, Jilin, China
| | - Jian-Jian Sun
- Department of Developmental and Behavioral Pediatrics, The First Hospital of Jilin University, Changchun, 130021, Jilin, China
| | - Chun-Ying Xiao
- Department of Developmental and Behavioral Pediatrics, The First Hospital of Jilin University, Changchun, 130021, Jilin, China
| | - Huan Ma
- Department of Developmental and Behavioral Pediatrics, The First Hospital of Jilin University, Changchun, 130021, Jilin, China
| | - Fei-Yong Jia
- Department of Developmental and Behavioral Pediatrics, The First Hospital of Jilin University, Changchun, 130021, Jilin, China
| | - Hong-Hua Li
- Department of Developmental and Behavioral Pediatrics, The First Hospital of Jilin University, Changchun, 130021, Jilin, China.
- School of Public Health, Jilin University, Changchun, Jilin, China.
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Wellen BCM, Bootes KR, Braley EI, Conelea CA, Woods DW, Himle MB. Caregiver Perspectives on the Health Care System for Tic Disorders: Utilization and Barriers. J Dev Behav Pediatr 2023; 44:e581-e589. [PMID: 37820348 DOI: 10.1097/dbp.0000000000001221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Accepted: 08/07/2023] [Indexed: 10/13/2023]
Abstract
OBJECTIVE This study aimed to understand health care experiences among a sample of caregivers of children with TDs to inform future directions for improving the health care system. METHODS We conducted a survey of caregivers of youth with TDs and used descriptive statistics and quantitative analyses to characterize the health care utilization practices of the sample. RESULTS The majority (70%) of families first consulted their pediatrician/primary care provider, and caregivers reported receiving care in line with current best practice guidelines. However, caregivers in the current sample perceived a lack of knowledgeability on the part of their first providers, which significantly predicted more providers seen and also reported difficulty finding specialty providers (63% of the sample reported difficulty finding a treatment provider who understood tics). CONCLUSION Results suggest that improving caregiver satisfaction with early health care experiences for their child's TD may help to relieve the burden on families and the health care system more broadly, along with continued efforts to increase the number of specialty providers available.
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Affiliation(s)
- Brianna C M Wellen
- University of Utah, Salt Lake City, UT
- University of Minnesota Medical School, Minneapolis, MN
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Willford S, Deeb W. Scoping Review of Multidisciplinary Care in Tourette Syndrome. Mov Disord Clin Pract 2023; 10:868-877. [PMID: 37332642 PMCID: PMC10272911 DOI: 10.1002/mdc3.13731] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Revised: 02/03/2023] [Accepted: 03/05/2023] [Indexed: 03/20/2023] Open
Abstract
Objective To review current multidisciplinary care practices in patients with Tourette syndrome (TS). Background Individuals with TS can have multiple symptoms and comorbidities and require treatment to encompass all of their needs. A multidisciplinary research or care model approaches the situation/problem from all sides and uses multiple perspectives. Methods A database search of Medline (using Pubmed), PsychINFO, and Scopus was performed using keywords related to multidisciplinary care and TS. The authors then screened the results for relevant information using a standardized extraction form to collect data. Next, relevant codes from text analysis were extracted with a final list agreed on with author consensus. Finally, we inferred common themes. Results The search revealed 2304 citations, and 87 were selected for full-text analysis. One additional article was identified by manual search. Thirty-one citations were deemed relevant. Multidisciplinary team members typically included a psychiatrist or child psychiatrist, a neurologist or child neurologist, and a psychologist or therapist at the core. Four primary benefits were associated with multidisciplinary care: establishing the diagnosis, managing the complexity of TS and its associated comorbidities, averting complications, and evaluating advanced therapies. Limitations include possible poor team dynamics and rigidity in the approach leading to an algorithmic treatment plan. Conclusions A multidisciplinary care model for TS is the preferred model advocated by patients, physicians, and organizations. This scoping review reveals that the impetus for multidisciplinary care rests on four primary benefits, but there is a lack of empirical evidence for defining and evaluating its use.
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Affiliation(s)
- Samantha Willford
- Department of NeurologyUMass Chan Medical SchoolWorcesterMassachusettsUSA
| | - Wissam Deeb
- Department of NeurologyUMass Chan Medical SchoolWorcesterMassachusettsUSA
- Department of NeurologyUMass Memorial Medical CenterWorcesterMassachusettsUSA
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Bond M, Moll N, Rosello A, Bond R, Schnell J, Burger B, Hoekstra PJ, Dietrich A, Schrag A, Kocovska E, Martino D, Mueller N, Schwarz M, Meier UC. Vitamin D levels in children and adolescents with chronic tic disorders: a multicentre study. Eur Child Adolesc Psychiatry 2022; 31:1-12. [PMID: 33851280 PMCID: PMC9343310 DOI: 10.1007/s00787-021-01757-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Accepted: 03/08/2021] [Indexed: 11/24/2022]
Abstract
This study investigated whether vitamin D is associated with the presence or severity of chronic tic disorders and their psychiatric comorbidities. This cross-sectional study compared serum 25-hydroxyvitamin D [25(OH)D] (ng/ml) levels among three groups: children and adolescents (3-16 years) with CTD (n = 327); first-degree relatives (3-10 years) of individuals with CTD who were assessed for a period of up to 7 years for possible onset of tics and developed tics within this period (n = 31); and first-degree relatives who did not develop tics and were ≥ 10 years old at their last assessment (n = 93). The relationship between 25(OH)D and the presence and severity of tics, as well as comorbid obsessive-compulsive disorder (OCD) and attention-deficit/hyperactivity disorder (ADHD), were analysed controlling for age, sex, season, centre, latitude, family relatedness, and comorbidities. When comparing the CTD cohort to the unaffected cohort, the observed result was contrary to the one expected: a 10 ng/ml increase in 25(OH)D was associated with higher odds of having CTD (OR 2.08, 95% CI 1.27-3.42, p < 0.01). There was no association between 25(OH)D and tic severity. However, a 10 ng/ml increase in 25(OH)D was associated with lower odds of having comorbid ADHD within the CTD cohort (OR 0.55, 95% CI 0.36-0.84, p = 0.01) and was inversely associated with ADHD symptom severity (β = - 2.52, 95% CI - 4.16-0.88, p < 0.01). In conclusion, lower vitamin D levels were not associated with a higher presence or severity of tics but were associated with the presence and severity of comorbid ADHD in children and adolescents with CTD.
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Affiliation(s)
- Molly Bond
- Blizard Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, 4 Newark Street, London, E1 2AT, UK.
| | - Natalie Moll
- Institute of Laboratory Medicine, University Hospital, LMU Munich, Munich, Germany
| | - Alicia Rosello
- Statistics, Modelling and Economic Department, National Infection Service, PHE, London, UK ,Department of Infectious Disease Epidemiology, London School of Hygiene and Tropical Medicine, London, UK
| | - Rod Bond
- University of Sussex, Brighton, UK
| | - Jaana Schnell
- Department of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Munich, Germany
| | - Bianka Burger
- Department of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Munich, Germany
| | - Pieter J. Hoekstra
- Department of Child and Adolescent Psychiatry, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Andrea Dietrich
- Department of Child and Adolescent Psychiatry, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Anette Schrag
- Department of Clinical Neuroscience, UCL Institute of Neurology, University College London, London, UK
| | - Eva Kocovska
- Blizard Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, 4 Newark Street, London, E1 2AT UK
| | - Davide Martino
- Department of Clinical Neurosciences, Cumming School of Medicine and Hotchkiss Brain Institute, University of Calgary, Calgary, AB Canada
| | - Norbert Mueller
- Department of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Munich, Germany
| | - Markus Schwarz
- Institute of Laboratory Medicine, University Hospital, LMU Munich, Munich, Germany
| | - Ute-Christiane Meier
- Institute of Psychiatry, Psychology and Neuroscience, King’s College London, London, UK ,Ludwig-Maximilians-University Munich, Munich, Germany
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Bhikram T, Elmaghraby R, Abi-Jaoude E, Sandor P. An International Survey of Health Care Services Available to Patients With Tourette Syndrome. Front Psychiatry 2021; 12:621874. [PMID: 33716822 PMCID: PMC7953144 DOI: 10.3389/fpsyt.2021.621874] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Accepted: 02/05/2021] [Indexed: 12/13/2022] Open
Abstract
Objective: Tourette syndrome (TS) is a neuropsychiatric disorder that is highly associated with several comorbidities. Given the complex and multifaceted nature of TS, the condition is managed by a wide variety of practitioners in different disciplines. The goal of this study was to investigate health service delivery and care practices by clinicians who see TS patients across different geographic settings internationally. Methods: A comprehensive questionnaire was developed to assess clinical care resources for patients with TS and was sent to clinicians in Canada (CA), the United States (US), Europe (EU), and the United Kingdom (UK). Responses were compared quantitatively between geographic regions. Results: The majority of respondents, regardless of region, reported that fewer than 40% of their case-load are patients with tics. The accessibility of TS services varied among regions, as indicated by differences in wait times, telemedicine offerings, comorbidity management and the availability of behavioral therapies. First-line pharmacotherapy preferences varied among physicians in different geographical regions with CA respondents preferring alpha-2-adrenergic agonists and respondents from the UK and EU preferring dopamine receptor antagonists. Discussion: The results suggest that there is a scarcity of specialized TS clinics, potentially making access to services challenging, especially for patients newly diagnosed with TS. Differences in regional pharmacotherapeutic preferences are reflected in various published treatment guidelines in EU and North America. The lack of dedicated specialists and telemedicine availability, coupled with differences in comorbidity management, highlight the need for interprofessional care and holistic management to improve health care delivery to patients with TS.
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Affiliation(s)
- Tracy Bhikram
- Department of Psychiatry, University Health Network and University of Toronto, Toronto, ON, Canada
| | - Rana Elmaghraby
- Department of Psychiatry, University Health Network and University of Toronto, Toronto, ON, Canada
- Youthdale Treatment Centre, Toronto, ON, Canada
| | - Elia Abi-Jaoude
- Department of Psychiatry, University Health Network and University of Toronto, Toronto, ON, Canada
- Department of Psychiatry, The Hospital for Sick Children, University of Toronto, Toronto, ON, Canada
| | - Paul Sandor
- Department of Psychiatry, University Health Network and University of Toronto, Toronto, ON, Canada
- Youthdale Treatment Centre, Toronto, ON, Canada
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Health-related quality of life, anxiety and depression in parents of adolescents with Gilles de la Tourette syndrome: a controlled study. Eur Child Adolesc Psychiatry 2017; 26:603-617. [PMID: 27942998 DOI: 10.1007/s00787-016-0923-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/16/2016] [Accepted: 11/21/2016] [Indexed: 01/12/2023]
Abstract
Our objectives were to assess health-related quality of life (HRQoL), anxiety, depression of Gilles de la Tourette syndrome (GTS) adolescents' parents compared to controls; to assess GTS adolescents' HRQoL compared to controls; to investigate which parental and adolescent variables are associated with poorer parental HRQoL. The controlled study involved GTS outpatients and their parents, adolescent healthy controls matched for gender and age and their parents. Parents' HRQoL was assessed using SF-36 and WHOQOL-BREF; anxiety, depression using HADS. Adolescents' HRQoL was assessed by adolescents using VSP-A instrument and by their parents using VSP-P. A total of 75 GTS adolescents, 75 mothers, 63 fathers were compared to 75 control adolescents, 75 mothers, 62 fathers. GTS mothers had worse HRQoL than controls on 5 of the 8 SF-36 dimensions and 1 of the 4 WHOQOL-BREF dimensions, while GTS fathers had worse HRQoL on 2 of the WHOQOL-BREF dimensions. GTS mothers had poorer HRQoL than fathers. GTS mothers had more depression than control mothers and GTS fathers had more anxiety than control fathers. GTS adolescents had worse HRQoL than controls on 5 of the 9 VSP-A dimensions. Factors significantly related to parental HRQoL were anxiety, depression, GTS adolescents' HRQoL and, concerning mothers, behavioural and emotional adolescents' problems; concerning fathers, severity of vocal tics, duration since first symptoms. This study provides a better understanding of poorer HRQoL and psychiatric morbidity of GTS adolescents' parents. Clinicians should pay attention to their emotional well-being and HRQoL and be aware that mothers and fathers are differently affected.
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Robertson MM, Eapen V. The Psychosocial Aspects of the Gilles de la Tourette Syndrome: Empirical Evidence from the Literature. Curr Behav Neurosci Rep 2017. [DOI: 10.1007/s40473-017-0107-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Yang J, Hirsch L, Martino D, Jette N, Roberts J, Pringsheim T. The prevalence of diagnosed tourette syndrome in Canada: A national population-based study. Mov Disord 2016; 31:1658-1663. [PMID: 27548401 DOI: 10.1002/mds.26766] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2016] [Revised: 07/28/2016] [Accepted: 07/31/2016] [Indexed: 02/05/2023] Open
Abstract
OBJECTIVE The objective of this study was to examine: (1) the prevalence of diagnosed Tourette syndrome in Canada by sex in youth (aged 12-17) and adults and (2) socioeconomic factors in this population. BACKGROUND The majority of epidemiological studies of tics have focused on children and youth, with few studies describing the prevalence of tics in adult populations. METHODS Canadian data on Tourette syndrome prevalence were derived from the Canadian Community Health Survey 2010 and 2011 cycles, a Statistics Canada population-based cross-sectional survey that collects information related to health status. We determined the prevalence of diagnosed Tourette syndrome and examined sociodemographic factors, including age, sex, education, income, employment, and birthplace. RESULTS Overall, 122,884 Canadians participated in the surveys, with 122 participants diagnosed with Tourette syndrome. The prevalence of Tourette syndrome was higher in males in youth: 6.03 per 1000 (95% confidence interval: 3.24-8.81) in males versus 0.48 per 1,000 (95% confidence interval: 0.05-0.91) in females, with a prevalence risk ratio of 5.31 (95% confidence interval: 2.38-11.81). In adults, the prevalence of Tourette syndrome was 0.89 per 1,000 (95% confidence interval: 0.48-1.29) in males versus 0.44 (95% confidence interval: 0.16.0-0.71) in females, with a prevalence risk ratio of 1.93 (95% confidence interval: 1.21-3.08). After adjusting for age and sex, adults with Tourette syndrome had lower odds of receiving postsecondary education or being employed and higher odds of having income lower than the median and receiving governmental support. CONCLUSION Data on the prevalence of Tourette syndrome in adults are scarce because most studies focus on children. Our data demonstrate a decreasing prevalence risk ratio for sex in adults compared to children. A diagnosis of Tourette syndrome is associated with lower education, income, and employment in adulthood. © 2016 International Parkinson and Movement Disorder Society.
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Affiliation(s)
- Jaeun Yang
- School of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada
| | - Lauren Hirsch
- Department of Community Health Sciences, University of Calgary, Calgary, Alberta, Canada
| | - Davide Martino
- International Parkinson's Centre of Excellence, King's College and King's College Hospital, London, United Kingdom.,Queen Elizabeth Hospital, Woolwich, Lewisham & Greenwich NHS Trust, London, United Kingdom
| | - Nathalie Jette
- Department of Community Health Sciences, University of Calgary, Calgary, Alberta, Canada.,Department of Clinical Neurosciences and Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta, Canada
| | - Jodie Roberts
- Department of Community Health Sciences, University of Calgary, Calgary, Alberta, Canada.,Department of Clinical Neurosciences and Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta, Canada
| | - Tamara Pringsheim
- Department of Community Health Sciences, University of Calgary, Calgary, Alberta, Canada.,Department of Clinical Neurosciences and Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta, Canada.,Mathison Centre for Mental Health Research and Education, University of Calgary, Calgary, Alberta, Canada
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