1. Department of Clinical and Experimental Medicine; Section of Dermatology; University of Messina; Messina Italy
2. Department of Dermatology and Venereology; University of Graz; Graz Austria
3. Professor Rubem David Azulay Institute; Charity Hospital of Rio de Janeiro; Rio de Janeiro Brazil
4. Department of Dermatology and Venereology; Medical University of Graz; Graz Austria
5. Department of Dermatology and Venereology; University of Trieste; Ospedale Maggiore Trieste Italy