1. Department of Dermatology, Hospital Universitario de La Princesa, Madrid, Spain;
2. Department of Dermatology, Hospital Central de la Defensa Gómez Ulla, Madrid, Spain;
3. Department of Dermatology, Hospital Universitario Vall d'Hebron, Barcelona, Spain;
4. Department of Dermatology, Hospital Universitario Doce de Octubre, Madrid, Spain;
5. Department of Dermatology, Hospital Universitario de la Santa Creu i Sant Pau, Barcelona, Spain;
6. Department of Dermatology, Hospital Universitario Marqués de Valdecilla, Santander, Spain;
7. Department of Dermatology, Hospital Universitario de Bellvitge, L'Hospitalet de Llobregat, Spain;
8. Department of Dermatology, Hospital General Universitario Reina Sofía, Murcia, Spain;
9. Department of Dermatology, Hospital General Universitario de Alicante, Alicante, Spain;
10. Department of Dermatology, Hospital Universitario Infanta Leonor, Madrid, Spain;
11. Department of Dermatology, Hospital del Mar, Parc de Salut Mar, Barcelona, Spain;
12. Department of Dermatology, Hospital Universitario Germans Trias i Pujol, Badalona, Spain;
13. Department of Dermatology, Hospital Universitario Reina Sofía, Córdoba, Spain;
14. Department of Dermatology, Complejo Hospitalario Universitario de Pontevedra, Pontevedra, Spain;
15. Department of Dermatology, Hospital Universitario Arnau de Vilanova, Valencia, Spain;
16. Research Unit. Fundación Piel Sana AEDV, Madrid, Spain;
17. Department of Dermatology, Complejo Hospitalario Universitario de Vigo, Vigo, Spain