1. San Gallicano Dermatological Institute-IRCCS; Via Chianesi 53 00144 Rome Italy
2. Dermatology Unit; Arcispedale ASMN-IRCCS; Reggio Emilia Italy
3. Department of Medicine and Medical Specialties; University de Alcalà; Madrid Spain
4. Memorial Sloan Kettering Cancer Center; New York NY U.S.A