[1] Hackensack Univ, Joseph M Sanzari Childrens Hosp, Rheumatol Sect, Dept Pediat, Hackensack, NJ 07640 USA
[2] Univ Calgary, Rheumatol Sect, Dept Paediat, Calgary, AB T3B 6A8, Canada
[3] Alberta Childrens Prov Gen Hosp, Calgary, AB T3B 6A8, Canada
[4] Rutgers Robert Wood Johnson Med Sch, Div Pediat Rheumatol, Dept Pediat, New Brunswick, NJ 08901 USA
[5] Child Hlth Inst New Jersey, Div Pediat Rheumatol, New Brunswick, NJ 08901 USA
[6] Hosp Sick Children, Toronto, ON M5G 1X8, Canada
[7] Univ Toronto, Lawrence S Bloomberg Fac Nursing, Toronto, ON, Canada