Gupta Aditya K, Ryder Jennifer E, Summerbell Richard C
Division of Dermatology, Department of Medicine, Sunnybrook and Women's College Health Science Center (Sunnybrook site), Toronto, Ont., Canada.
Int J Dermatol. 2003 Apr;42(4):272-3. doi: 10.1046/j.1365-4362.2003.01788.x.