1. Department of Dermatology; Bellvitge Hospital; Barcelona Spain
2. Department of Cutaneous Medicine and Surgery; The Royal London Hospital and QMUL; Bart's Health NHS Trust; London UK
3. CentroDerm Clinic; Wuppertal Germany
4. Faculty of Health; University Witten-Herdecke; Witten Germany
5. Department of Dermato-Cancerology; University of Nantes; Nantes France
6. Manchester Academic Health Science Centre, MAHSC; Manchester University and Salford Royal NHS Foundation Trust; Royal Infirmary; The University of Manchester; Manchester UK
7. Department of Dermatology; University of Modena and Reggio Emilia; Modena Italy
8. Department of Dermatology; Catholic University of Rome; Rome Italy
9. Dermatology Unit; Virgen Macarena University Hospital; Seville Spain