1. State Clinic of Dermatology; Hospital of Skin and Venereal Diseases; Thessaloniki Greece
2. Skin Cancer Unit; Arcispedale Santa Maria Nuova IRCCS; Reggio Emilia Italy
3. Second Department of Dermatology; School of Medicine; Aristotle University; Papageorgiou Hospital; Thessaloniki Greece
4. First Department of Dermatology; School of Medicine; Aristotle University; Hospital of Skin and Venereal Diseases; Thessaloniki Greece
5. Department of Dermatology; University Hospital of Heraklion; Heraklion Greece
6. First Department of Otorhinolaryngology - Head and Neck Surgery; School of Medicine; Aristotle University; Hospital of Skin and Venereal Diseases; Thessaloniki Greece
7. First Department of Dermatology; School of Medicine; University of Athens; ‘Andreas Sygros’ Hospital for Skin and Venereal Diseases; Athens Greece
8. Department of Dermatology; Medical University of Graz; Graz Austria