1. Department of Clinical-Surgical, Diagnostic and Pediatric Sciences, University of Pavia, 27100 Pavia, Italy
2. Dermatology Clinic, Fondazione IRCCS Policlinico San Matteo, 27100 Pavia, Italy
3. Department of Science of Public Health and Pediatrics, University of Turin, 10126 Turin, Italy
4. Department of Quality and Risk Management, Fondazione IRCCS Policlinico San Matteo, 27100 Pavia, Italy