1. Dermatology, Department of Experimental, Diagnostic and Specialty Medicine; University of Bologna; Bologna Italy
2. Department of Dermatology; Emory University School of Medicine; Atlanta GA USA
3. Department of Dermatology; Radboud University Medical Center; Nijmegen The Netherlands
4. National and Kapodistrian University of Athens; Medical School University Hospital “A. Sygros”; Department of Dermatology and Venereology; Athens Greece