[1] Univ Toronto, Dept Med, Div Dermatol, Dalla Lana Sch Publ Hlth, Toronto, ON, Canada
[2] Univ Toronto, Dept Ophthalmol & Vis Sci, Dalla Lana Sch Publ Hlth, Toronto, ON, Canada
[3] Univ Toronto, Inst Hlth Policy Management & Evaluat, Dalla Lana Sch Publ Hlth, Toronto, ON, Canada
[4] Womens Coll Hosp, Toronto, ON, Canada
[5] Univ Ottawa, Fac Med, Ottawa, ON, Canada
[6] Sunnybrook Hlth Sci Ctr, Toronto, ON, Canada
[7] Prob Med Res Inc, Waterloo, ON, Canada
[8] Womens Coll Hosp, Dept Dermatol, 76 Grenville St,Fifth Floor, Toronto, ON M5S 1B2, Canada