1 Center for Dermatology and Hair Diseases Professor Trüeb, Zürich, Switzerland.
2 Department of Dermatology, Lusíada University Foundation, Santos, São Paulo, Brazil.
3 Department of Dermatology, Universidade Federal Fluminense, Centro De Ciências Médicas, Hospital Universitário Antonia Pedro, Niterói - Rio De Janeiro, Brazil.
4 Department of Dermatology, Cantonal Hospital, Aarau, Switzerland.