1 Center for Dermatology and Hair Diseases Professor Trüeb, Zurich-Wallisellen, Switzerland.
2 Department of Dermatology, Cantonal Hospital Aarau, Aarau, Switzerland.
3 Department of Dermatology, Centro de Ciências Médicas, Universidade Federal Fluminense, Hospital Universitário Antonia Pedro, Niterói - Rio de Janeiro, Brazil.
4 Department of Dermatology, Alvaro Alvim School Hospital, Campos dos Goytacazes, Rio de Janeiro, Brazil.