[1] Univ Toronto, Hosp Sick Children, Div Rheumatol, Toronto, ON, Canada
[2] Hosp Sick Children, Toronto, ON, Canada
[3] Hosp Sick Children, Div Rheumatol, Toronto, ON, Canada
[4] Hosp Sick Children, Dept Psychol, Toronto, ON, Canada
[5] Hosp Sick Children, Dept Psychiat, Toronto, ON, Canada
[6] Hosp Sick Children, Montreal, PQ, Canada
[7] Univ Toronto, Dept Psychiat, SickKids, Toronto, ON, Canada
[8] Univ Toronto, Hosp Sick Children, Dept Paediat, Div Rheumatol,Child Hlth Evaluat Sci,Res Inst, Toronto, ON, Canada
[9] Univ Toronto, Hosp Sick Children, Res Inst, Div Rheumatol,Dept Paediat,Translat Med, Toronto, ON, Canada
[10] Univ Toronto, Hosp Sick Children, Div Rheumatol, Dept Paediat, Toronto, ON, Canada