1. Section of Dermatology, Department of Clinical and Experimental Medicine University of Parma Parma Italy
2. Dermatology Unit Ospedale San Bortolo Vicenza Italy
3. Section of Dermatology and Infectious Diseases, Department of Medical Sciences University of Ferrara Ferrara Italy
4. Division of Dermatology, Department of Experimental, Diagnostic and Specialty Medicine IRCCS Azienda Ospedaliero‐Universitaria di Bologna Policlinico S Orsola Bologna Italy