1. Dermatology Unit, Department of Clinical Internal Anesthesiologic Cardiovascular Sciences, Sapienza University of Rome, 00185 Rome, Italy
2. School of Medicine, Vita-Salute San Raffaele University, 20132 Milan, Italy
3. Dermatology Clinic, IRCCS San Raffaele Hospital, 20132 Milan, Italy
4. Department of Medicine, Dermatology Service, Memorial Sloan-Kettering Cancer Center, New York, NY 10021, USA
5. Department of Dermatology, University of Modena and Reggio Emilia, 41124 Modena, Italy
6. Department of Dermatology and Cutaneous Surgery, University of Miami, Miami, FL 33136, USA
7. Unit of Dermatology, University of Rome Tor Vergata, 00133 Rome, Italy