1. Department of Dermatology and Wound Healing Centre Copenhagen University Hospital, Bispebjerg and Frederiksberg Copenhagen Denmark
2. 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
3. Dermatology Unit, Department of Clinical and Experimental Medicine University of Parma Parma Italy