1. Dermatology Clinic, Maggiore Hospital University of Trieste Trieste Italy
2. Department of Clinical and Experimental Medicine, Dermatology University of Messina Messina Italy
3. College of Medicine Central Michigan University Saginaw Michigan USA
4. Department of Plastic, Reconstructive and Cosmetic Surgery, Dermatology Section Campus Bio‐Medico University Hospital Rome Italy
5. University of Rome G. Marconi Rome Italy