[1] Western Univ, London, ON, Canada
[2] Western Univ, Dept Med, Div Rheumatol, London, ON, Canada
[3] Inst Clin Evaluat Sci, Toronto, ON, Canada
[4] Univ Toronto, Toronto, ON, Canada
[5] McMaster Univ, Dept Med, Hamilton, ON, Canada
[6] Univ Toronto, Sunnybrook Res Inst, Inst Clin Evaluat Sci, Toronto, ON, Canada