1. Dermatology Department, Clínica Universidad de Navarra, 28027 Madrid, Spain
2. Dermatology Department, Hospital Universitario Galdakao, 48960 Galdakao, Spain
3. Romero y Medina Dermatology Clinic, 29640 Fuengirola, Spain
4. Dermatology Department, Complejo Asistencial de Ávila, 05071 Ávila, Spain
5. Dermatology Department, Consorci Sanitari Integral, Hospital Dos de Mayo, 08025 Barcelona, Spain