[1] Univ British Columbia, Dept Microbiol & Immunol, Vancouver, BC, Canada
[2] BC Childrens Hosp Res Inst, Vancouver, BC, Canada
[3] BC Childrens Hosp, Div Rheumatol, Dept Pediat, Vancouver, BC, Canada
[4] Univ British Columbia, Vancouver, BC, Canada
[5] BC Childrens Hosp Res Inst, Div Rheumatol, Dept Pediat, Vancouver, BC, Canada