1. 2nd Department of Dermatology and Venereology; University of Athens Medical School; Attikon Hospital; Athens 12462 Greece
2. 1st Department of Dermatology and Venereology; University of Athens Medical School; ‘A. Syggros’ Hospital; Athens 16121 Greece
3. 2nd Department of Pathology; University of Athens Medical School; Attikon Hospital; Athens 12462 Greece