[1] Northwestern Univ, Dept Pediat, Feinberg Sch Med, Chicago, IL 60611 USA
[2] Northwestern Univ, Feinberg Sch Med, Dept Med Social Sci, Chicago, IL 60611 USA
[3] Ann & Robert H Lurie Childrens Hosp Chicago, Div Rheumatol, Chicago, IL 60611 USA
[4] Northwestern Univ, Feinberg Sch Med, Med Social Sci, Chicago, IL 60611 USA
[5] Ann & Robert H Lurie Childrens Hosp Chicago, Stanley Manne Childrens Res Inst, Cure JM Program Excellence Juvenile Myositis Res, Chicago, IL 60611 USA
[6] Northwestern Univ, Feinberg Sch Med, Prevent Med, Chicago, IL 60611 USA
[7] Ann & Robert H Lurie Childrens Hosp Chicago, Div Rheumatol, Chicago, IL 60611 USA
[8] Northwestern Univ, Feinberg Sch Med, Pediat, Chicago, IL 60611 USA
[9] Northwestern Univ, Feinberg Sch Med, Prevent Med Med & Phys Med & Rehabil, Chicago, IL 60611 USA