1. Dermatology Department; Melanoma Unit; Hospital Clinic & IDIBAPS (Institut d'Investigacions Biomèdiques August Pi i Sunyer); Villarroel 170 Barcelona 08036 Spain
2. Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER); Barcelona Spain
3. Department of Pathology; Hospital Clinic of Barcelona; Barcelona Spain
4. Department of Medicine; University of Barcelona; Barcelona Spain