1. Department of Dermatology, Hospital General San Jorge, Huesca, Spain
2. Department of Dermatology, Hospital Universitario San Cecilio, Granada, Spain
3. Department of Dermatology, Hospital Clínic, Barcelona, Spain
4. Department of Dermatology, Hospital La Paz, Madrid, Spain
5. Hospital de Sant Joan Despí Moisès Broggi, Barcelona, Spain
6. Department of Dermatology, Hospital Puerta de Hierro, Madrid, Spain
7. Hospital General San Jorge, Huesca, Spain
8. Department of Pathology, Hospital Universitario San Cecilio, Granada, Spain
9. Hospital Clínic, Barcelona, Spain
10. Hospital La Paz, Madrid, Spain
11. Hospital Puerta de Hierro, Madrid, Spain