1. Second Department of Dermatology; Athens University School of Medicine; Attikon General University Hospital; Chaidari Athens Greece
2. Skin Cancer Unit; Arcispedale Santa Maria Nuova IRCCS; Reggio Emilia Italy
3. Dermatology Unit; Hospital General de Agudos “Dr. Cosme Argerich”; Buenos Aires Argentina
4. Department of Dermatology; Medical University of Graz; Graz Austria