1 Dermatology Department, University of Pisa. Via Roma 67, 56126 Pisa, Italy.
2 Department of Pathophysiology and Transplantation, Università degli Studi di Milano, I.R.C.C.S. Foundation, Cà Granda Ospedale Maggiore Policlinico, Milan, Italy.
3 Section of Dermatology, Department of Clinical Medicine and Surgery, University of Naples Federico II, Naples, Italy.
4 Istituto Dermopatico dell'Immacolata (IDI) via Monti di Creta 104, 00167 Rome, Italy.
5 Dermatology Unit, Ospedale Civile di Venezia, Fondamente Nove, 6593, 30122 Venice, Italy.
6 Dermatology Clinic, University of Catania, Catania, Italy.