1. Laboratory of Molecular and Cell Biology; Istituto Dermopatico dell'Immacolata-IRCCS; via dei Monti di Creta 104 00167 Rome Italy
2. Dermatology Division; Ospedale Pediatrico Bambino Gesù-IRCCS; P.zza Sant'Onofrio 4 00165 Rome Italy
3. Department of Pathology; Ospedale Pediatrico Bambino Gesù-IRCCS; P.zza Sant'Onofrio 4 00165 Rome Italy