1. Dermatology and Skin Cancer Unit; Arcispedale Santa Maria Nuova, Viale Risorgimento 80, 42100; Reggio Emilia; Italy
2. Department of Dermatology; Hospital de Sant Pau i Santa Tecla; Tarragona; Spain
3. State Clinic of Dermatology; Hospital of Skin and Venereal Diseases; Thessaloniki; Greece
4. Dermatology Center; Nemours; France
5. Clinic of Dermatovenerology; Clinical Center of Nis; Medical Faculty; University of Nis; Nis; Serbia