1 Dermatology Department, Hospital Clínic & Melanoma Group IDIBAPS (Institut d'Investigacions Biomèdiques August Pi i Sunyer), Barcelona, Spain.
2 Medical Sciences Department, Section of Dermatology, University of Turin, Turin, Italy.
3 Dermatology Department, University of Modena and Reggio Emilia, Modena, Italy.
4 Department of Pathology, Hospital Clínic de Barcelona, Barcelona, Spain.
5 Department of Dermatology, Hospital del Mar, Institut Hospital del Mar d'Investigacions Mèdiques, Universitat Autònoma de Barcelona, Barcelona, Spain.
6 Universitat de Barcelona, Barcelona, Spain.
7 Centro Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Instituto de Salud Carlos III (ISCIII), Barcelona, Spain.