1 Department of Dermatology, Dermatologia Medica & Laser Clinic, Porto Alegre, Rio Grande do Sul, Brazil.
2 Department of Dermatology and Allergology, StädtischesKlinikum Dresden, Academic Teaching Hospital of the Technical University of Dresden, Dresden, Germany.
3 Department of Dermatology, University General Hospital of Patras, Rion, Greece.
4 Post-Graduate Program in Pathology, Federal University of Health Sciences of Porto Alegre (UFCSPA), Porto Alegre, Brazil.
5 Sexually Transmitted Diseases Unit, Ambulatório de Dermatologia Sanitária, State Health Secretariat, Rio Grande, Brazil.