1. IRCSS-AOU S. Martino-IST; Department of Health Sciences; DISSAL; Section of Dermatology; University of Genoa; Genoa Italy
2. Section of Dermatology; University Hospital of Saint-Etienne; Saint-Etienne France
3. Department of Dermatology; University Hospital; Munster Germany
4. Department of Pathology; Hôpital Saint Louis; Assistance Publique-Hôpitaux de Paris; Paris France
5. Department of Dermatology; University Hospital Spedali Civili; Brescia Italy
6. Clinic of Dermatology; Medical Faculty University “Ss Cyril and Methodius”; Skopje Republic of Macedonia
7. Department of Medicine; Section of Dermatology and Venereology; University of Verona; Verona Italy
8. Department of Dermatology; CHU-Saint Pierre; Free University of Brussels; Brussels Belgium
9. Kempf and Pfaltz; Histological Diagnostics; and Dept. of Dermatology; University Hospital Zürich; Zürich Switzerland
10. Service de Dermatopathologie; Paris France