1 Institute of Dermatology, Catholic University of the Sacred Heart, Rome, Italy; Fondazione Policlinico Universitario A. Gemelli, IRCCS, Rome, Italy. Electronic address: ketty.peris@unicatt.it.
2 Department of Dermatology, University of L'Aquila, L'Aquila, Italy.
3 Centre for Dermatooncology, Department of Dermatology, Eberhard-Karls University, Tuebingen, Germany.
4 Department of Dermatology, Venereology and Allergology, University Hospital Frankfurt, Germany.
5 Department of Oncology, Odense University Hospital, Denmark.
6 Dermatology Department, Saint-Louis Hospital, Paris, France.
7 Twin Research and Genetic Epidemiology Unit, School of Basic & Medical Biosciences, King's College London, London, SE1 7EH, UK.
8 Department of Dermatology, Erasme Hospital, Université Libre de Bruxelles, Brussels, Belgium.
9 Department of Dermatology, University Hospital Zurich and University Zurich, Switzerland.
10 Centre for Cell Biology and Cutaneous Research, Blizard Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London, United Kingdom.
11 Department of Dermatology, University of Kiel, Kiel, Germany.
12 Department of Dermatology, Medical University of Vienna, Austria.
13 Department of Dermatology, University of Copenhagen, Bispebjerg Hospital, Copenhagen, Denmark.
14 Department of Dermatology, Hospital Clínic de Barcelona (Melanoma Unit), University of Barcelona, IDIBAPS, Barcelona & CIBERER, Barcelona, Spain.
15 Department of Oncology, University of Oxford, Old Road Campus, Oxford, OX3 9DU, UK.
16 Stirling Community Hospital, Stirling, UK.
17 Department of Dermatology, Instituto Valenciano de Oncologia, Valencia, Spain.
18 1(st)Department of Dermatology- Venereology, National and Kapodistrian University of Athens, School of Medicine, Andreas Sygros Hospital, Athens, Greece.
19 Clinic for Dermatology and Allergology, Klinikum Vest GmbH Teaching Hospital, Recklinghausen, Germany.
20 Fondazione Policlinico Universitario A. Gemelli IRCCS, UOC di Radioterapia, Dipartimento di Scienze Radiologiche, Radioterapiche Ed Ematologiche, Rome, Italy.
21 Second Department of Dermatology, Aristotle University Medical School, Papageorgiou General Hospital, Thessaloniki, Greece.
22 Dermatology Clinic, University of Trieste, Trieste, Italy.
23 Princess Máxima Center, Utrecht 3584 CS, the Netherlands.
24 University Department of Dermatology, Marseille, France.