1. Department of Dermatology; Universitair Ziekenhuis Brussel; Vrije Universiteit Brussel (VUB); Brussels Belgium
2. Department of Dermatology; Hôpital Erasme; Université Libre de Bruxelles; Brussels Belgium
3. Molecular and Pharmaco-Epidemiology Unit; Department of Experimental Oncology; European Institute of Oncology; IRCCS, Milan Italy