1. Clinical Dermatology IRCCS Istituto Ortopedico Galeazzi Milan Italy
2. Department of Biomedical, Surgical and Dental Sciences University of Milan Milan Italy
3. Phototherapy Unit, San Gallicano Dermatological Hospital Rome Italy
4. Laboratory for Industrial and Applied Mathematics (LIAM) Department of Mathematics and Statistics, York University Toronto Canada
5. Dermatology Unit, Azienda Ospedaliera San Donato Milanese Milan Italy