[1] Univ Toronto, Dept Med, Div Dermatol, Toronto, ON, Canada
[2] McMaster Univ, Michael G DeGroote Sch Med, Hamilton, ON, Canada
[3] Univ Toronto, Fac Med, Toronto, ON, Canada
[4] Univ British Columbia, Fac Med, Vancouver, BC, Canada
[5] Univ Waterloo, Sch Hlth, Waterloo, ON, Canada
[6] McMaster Univ, Med Radiat Sci, Hamilton, ON, Canada
[7] Trillium Hlth Partners, Dept Diagnost Imaging, Mississauga, ON, Canada
[8] Womens Coll Hosp, Dept Med, Div Dermatol, 76 Grenville St, Toronto, ON M5S 1B2, Canada