1. Department of Clinical Epidemiology and Biostatistics; McMaster University; Hamilton; Ontario; Canada
2. Department of Psychiatry; University of Toronto; Toronto; Ontario; Canada
3. Department of Psychiatry, University of British Columbia; Vancouver; British Columbia; Canada
4. Pathways Health and Research Centre, West End; Queensland; Australia
5. Department of Behavioral Sciences, University of Utrecht; Utrecht; The Netherlands
6. Department of Psychology; University of Queensland; Queensland; Australia
7. Department of Psychology; University of New South Wales; Sydney; New South Wales; Australia
8. Department of Psychology; University of Rhode Island; Kingstown; Rhode Island
9. Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine; Baltimore; Maryland
10. Department of Psychology; Leiden University; Leiden; The Netherlands
11. Department of Psychology; Macquarie University; New South Wales; Australia
12. Department of Psychology; Temple University; Philadelphia; Pennsylvania
13. Department of Psychiatry; Hospital for Sick Children; Toronto; Ontario; Canada
14. Department of Clinical Psychology; University of Groningen; Groningen; The Netherlands
15. Department of Psychology; Florida International University; Miami; Florida
16. Children's Center for OCD and Anxiety, Plymouth Meeting; Pennsylvania
17. Office of the Vice Chancellor, Griffith University; Queensland; Australia
18. Erasmus Medical Center Sophia-Children's Hospital; Rotterdam; The Netherlands
19. Graduate School of Education and Information Studies; University of California; Los Angeles; California