1. Dermatology Unit, Ospedale di Circolo, ASST Sette Laghi, Varese, Italy
2. Department of Medical Biotechnologies, University of Siena, Siena, Italy
3. Department of Medicine and Surgery, University of Insubria, Varese, Italy
4. Department of Dermatology and Venereology, IRCCS Istituto Ortopedico Galeazzi, Milan, Italy