1. Dermatology Department, Hospital Clínic, Universitat de Barcelona , Barcelona , Spain
2. Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS) , Barcelona , Spain
3. Centro de Investigación en Red de Enfermedades Raras (CIBERER), Instituto de Salud Carlos III , Barcelona , Spain
4. Pathology Department, Hospital Clínic, Universitat de Barcelona , Barcelona , Spain
5. Department of Dermatology, Hospital Universitari Mútua Terrassa, Barcelona, Spain
6. Department of Pathology, Hospital Universitari Mútua Terrassa , Barcelona , Spain