[1] Univ Toronto, Temerty Fac Med, Toronto, ON, Canada
[2] McMaster Univ, Fac Hlth Sci, Hamilton, ON, Canada
[3] Univ Toronto, Dept Med, Div Dermatol, Toronto, ON, Canada
[4] Sunnybrook Hlth Sci Ctr, Dept Dermatol, Toronto, ON, Canada
[5] Univ Calgary, Dept Med, Div Dermatol, Calgary, AB, Canada
[6] Dermatol Res Inst, Calgary, AB, Canada
[7] Skin Hlth & Wellness Ctr, Calgary, AB, Canada
[8] Univ Calgary, Dept Pediat, Sect Community Pediat, Calgary, AB, Canada
[9] Univ Calgary, Dept Pediat, Sect Pediat Rheumatol, Calgary, AB, Canada
[10] Prob Med Res, Waterloo, ON, Canada
[11] Womens Coll Hosp, Dept Dermatol, 76 Grenville St,5th floor, Toronto, ON M5S 1B2, Canada