1. Centroderm Clinic; Wuppertal Germany
2. Faculty of Health; University Witten-Herdecke; Witten Germany
3. Department of Dermatology; University of Modena and Reggio Emilia; Modena Italy
4. Dermatology Clinic; University of Catania; Catania Italy
5. Melanoma Unit; Dermatology Department; Hospital Clínic de Barcelona; IDIBAPS; Universitat de Barcelona; Barcelona Spain
6. Centro de Investigación Biomédica en Red en Enfermedades Raras (CIBERER); Valencia Spain
7. First Department of Dermatology; Andreas Sygros Hospital; University of Athens Medical School; Athens Greece
8. Department of Dermatology; Ruhr-University Bochum; Bochum Germany
9. Department of Dermatology; Monklands Hospital; Lanarkshire UK
10. University of Glasgow; Glasgow UK