1. Dermatology Clinic University of Catania Catania Italy
2. Section of Dermatology Department of Clinical Medicine and Surgery University Federico II of Naples Naples Italy
3. Dermatology Unit “Daniele Innocenzi” Department of Medical‐Surgical Sciences and Bio‐Technologies Sapienza University of Rome Terracina Italy
4. Medical Statistics Unit University of Campania “Luigi Vanvitelli” Naples Italy