Affiliation: | 1. Department of Dermatology, Hospital de Clínicas de Porto Alegre, School of Medicine, University of Rio Grande do Sul, Porto Alegre, RS, Brazil;2. Department of Dermatology, Hospital das Clínicas de S?o Paulo, School of Medicine, University of S?o Paulo, S?o Paulo, SP, Brazil;3. Department of Dermatology, St George Hospital, School of Medicine, University of New South Wales, Sydney, New South Wales, Australia |