V Brazzelli1, N Rivetti, A Carugno, S Barruscotti, G A Croci, G Perani, G Borroni. 1. Department of Clinical and Surgical Diagnostic and Pediatric Sciences, Dermatology Clinic, University of Pavia and Fondazione IRCCS Policlinico San Matteo Pavia, Pavia, Italy - v.brazzelli@smatteo.pv.it.