1. Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy;
2. Department of Advanced Biomedical Sciences, University of Naples Federico II, Napoli, Italy;
3. Department of Dermatology, Lausanne University Hospital CHUV and University of Lausanne, Lausanne, Switzerland;
4. Dermatology, Azienda Ospedaliero-Universitaria di Modena, Modena, Italy;
5. Medical Sciences, Section of Dermatology, University of Turin, Turin, Italy;
6. Hospital CUF Descobertas, Lisboa, Portugal;
7. Dermatology Unit, Azienda Ospedaliera San Donato Milanese, Milan, Italy;
8. Clínica Médica Belém, Lisboa, Portugal;
9. Department of Dermatology, University of Naples Federico II, Napoli, Italy;
10. Department of Dermatology, University of Padua, Padova, Italy;
11. Department of Dermatology, University of Pisa, Pisa, Italy;
12. Department of Dermatology, University of Padova, Padova, Italy;
13. Department of Dermatology, University of Florence, Florence, Italy;
14. Dermatology, Ctr Hosp Porto, Porto, Portugal