1. Department of Dermatology; Complejo Hospitalario Universitario Insular-Materno Infantil; Universidad de Las Palmas de Gran Canaria; Las Palmas de Gran Canaria Spain
2. Department of Dermatology; Hospital Arnau de Vilanova; Valencia Spain
3. Department of Dermatology; Hospital Universitari Son Espases; Palma de Mallorca Spain