1. Department of Dermato Cancerology; University of Nantes; Nantes France
2. Department of Dermatology and Venereology; Medical Faculty; Otto-Von-Guericke-Universitat; Magdeburg Germany
3. Department of Dermatology; Johns Hopkins Medicine; Baltimore MD USA
4. Department of Dermatology; Pennsylvania State University College of Medicine; Hershey PA USA
5. Department of Dermatology; Arcispedale S. Anna, University of Ferrara; Ferrara Italy
6. Department of Dermatology; Juarez Hospital; Mexico City Mexico
7. Department of Dermatology; University of Pennsylvania School of Medicine; Philadelphia PA USA