1. University of Bari ‐ Aldo Moro
2. University of Naples Federico II
3. University of Turin
4. University of Modena and Reggio Emilia
5. University of Campania
6. Unit of Internal Medicine‐"F. Miulli" Hospital Acquaviva delle Fonti
7. University Magna Graecia of Catanzaro
8. University of Perugia
9. Unit of Dermatology University of Bari
10. University of Cagliari
11. UOC Dermatologia Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico
12. Università degli Studi di Milano
13. University of Molise
14. AUSL Modena
15. National Institute of Statistics (ISTAT)
16. Azienda Ospedaliera Universitaria Federico II