1. Department of Dermatology, Hospital Universitario 12 de Octubre, Madrid, Spain
2. Department of Dermatology, Hospital Universitario de Gran Canaria Doctor Negrín, Las Palmas de Gran Canaria, Spain
3. Department of Dermatology, Hospital Universitario La Paz, Madrid, Spain
4. Department of Dermatology, Hospital Clinic de Barcelona, University of Barcelona, Barcelona, Spain
5. Institut d'Investigacions Biomediques August Pi I Sunyer (IDIBAPS), Barcelona, Spain
6. Biomedical Research Networking Center on Rare Diseases (CIBERER), ISCIII, Barcelona, Spain
7. Dermatology Service, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
8. Pfizer Medical Department, Alcobendas, Madrid, Spain
9. Instituto de Salud Musculoesquelética, Madrid, Spain
10. Department of Dermatology, Hospital General Universitario de Alicante, Instituto de Investigación Sanitaria y Biomédica de Alicante (ISABIAL-FISABIO Foundation), Alicante, Spain