1. Department of Anatomic Pathology; Hospital Universitari Germans Trias i Pujol; Universitat Autònoma de Barcelona; Spain
2. Department of Dermatology; Hospital de la Santa Creu i Sant Pau; Universitat Autònoma de Barcelona; Barcelona Spain
3. Department of Dermatology; Hospital Universitari Germans Trias i Pujol; Universitat Autònoma de Barcelona; Barcelona Spain