1 Department of Dermatology, Universidade Federal de São Paulo, Escola Paulista de Medicina (UNIFESP-EPM), São Paulo, São Paulo, Brazil.
2 Department of Dermatology, Rhode Island Hospital, Warren Alpert Medical School of Brown University, Providence, Rhode Island.
3 Discipline of Dermatology, São Paulo State University (UNESP) Medical School, Botucatu, São Paulo, Brazil.
4 Department of Dermatology, Rhode Island Hospital, Warren Alpert Medical School of Brown University, Providence, Rhode Island. Electronic address: carlos_wambier@brown.edu.