1. Dermatology Unit, Surgical, Medical, and Dental Department of Morphological Sciences Related to Transplant, Oncology and Regenerative Medicine University of Modena and Reggio Emilia Modena Italy
2. Section of Dermatology and Infectious Diseases, Department of Medical Sciences University of Ferrara Ferrara Italy
3. Department of Neurology, Regional Multiple Sclerosis Center Azienda Ospedaliero‐Universitaria San Luigi Gonzaga Orbassano Italy
4. Dermatology Unit, Department of Clinical and Experimental Medicine University of Parma Parma Italy