1. Dermatology Unit, IRCCS Humanitas Research Hospital, Rozzano, 20089 Milan, Italy
2. Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, 20089 Milan, Italy
3. Department of Dermatology, Dermatology Unit Azienda Ospedaliera San Donato Milanese, 20097 Milan, Italy
4. Dermatology Unit, Azienda Ospedaliera di Cosenza, 87100 Cosenza, Italy
5. Dermatology Unit, University of Campania L. Vanvitelli, 80138 Naples, Italy
6. Dermatology Unit, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Policlinico S. Orsola Malpighi, 40138 Bologna, Italy
7. Department of Dermatology, Dipartimento di Scienze della Salute (DISSAL), University of Genoa, IRCCS Ospedale Policlinico San Martino, 16100 Genoa, Italy
8. Dermatology Unit, Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico, 20122 Milan, Italy
9. Department of Biomedical, Surgical and Dental Sciences, University of Milan, 20133 Milan, Italy
10. Clinical Dermatology, IRCCS Ospedale Galeazzi-Sant’Ambrogio, 20157 Milan, Italy
11. Department of Biomedical Science and Human Oncology, Second Dermatologic Clinic, University of Turin, 10124 Turin, Italy
12. Dermatology Unit, Department of Clinical and Experimental Medicine Ospedale Santa Chiara, 11 Via Roma 67, 56126 Pisa, Italy
13. Department of Medicine, Section of Dermatology and Venereology, University of Verona, Piazzale A. Stefani 1, 37126 Verona, Italy
14. Department of Biomedical and Dental Sciences and Morphofunctional Imaging, Unit of Dermatology, University of Messina, AOU Policlinico G. Martino, Via Consolare Valeria 1, 98125 Messina, Italy
15. Dermatological Clinic, Department of Specialized Medicine, University of Modena, Via del Pozzo 71, 41121 Modena, Italy
16. Department of Dermatology, University of Bari, Piazza Umberto I, 1, 70121 Bari, Italy
17. Department of Pathophysiology and Transplantation, Università degli Studi di Milano, 20122 Milan, Italy
18. Section of Dermatology, Department of Clinical Medicine and Surgery, University of Naples Federico II, 80131 Naples, Italy
19. UOC Clinical Dermatology—Dermatological Institute S. Gallicano, IRCCS, 00167 Rome, Italy
20. Clinical Epidemiology Unit, Istituto Dermopatico dell’Immacolata (IDI), IRCCS, 00167 Rome, Italy
21. U.O.S.D. Dermatologica—Centro per la Cura Della Psoriasi, Ospedale Perrino, 72100 Brindisi, Italy