Georgi Tchernev1, Gavrail Poterov2, Jose Carlos Cardoso3. 1. Onkoderma-Clinic for Dermatology, Venereology and Dermatologic Surgery, 1606, General Skobelev 26, Bulgaria. 2. Onkoderma-Clinic for Dermatology, Venereology and Dermatologic Surgery, 1606, General Skobelev 26, Bulgaria. poterovg@gmail.com. 3. Department of Dermatology and Venereology, University Hospital of Coimbra, Coimbra, Portugal.