1. Department of Dermatology; Sant Pau i Santa Tecla Hospital; Tarragona Spain
2. Department of Dermatology; ‘Doctor Negrín' University Hospital of Gran Canaria; Gran Canaria Spain
3. Department of Dermatology; University Hospital of Son Espases; Palma Mallorca Spain
4. Department of Dermatology; University Hospital of Alicante; Alicante Spain