1. Department of Psychiatry, The Hospital for Sick Children, Toronto, Canada
2. Department of Psychiatry, University of Toronto, Toronto, Canada
3. Division of Rheumatology, The Hospital for Sick Children, Toronto, Canada
4. Department of Paediatrics, University of Toronto, Toronto, Canada
5. Division of Pediatric Rheumatology-Immunology, CHU Sainte-Justine, Montreal, Canada
6. Department of Pediatrics, CHU Sainte-Justine, University of Montreal, Montreal, Canada
7. Department of Psychology, The Hospital for Sick Children, Toronto, Canada