1. Research Unit; Fundación Piel Sana Academia Española de Dermatología y Venereología; Madrid Spain
2. Department of Dermatology; Complexo Hospitalario Universitario de Vigo (CHUVI); Vigo Spain
3. Centre for Dermatology Research; Division of Musculoskeletal and Dermatological Sciences; The University of Manchester; Manchester Academic Health Science Centre; Manchester U.K
4. Department of Quality Measures and Research; Chief Physician Office; Clalit Health Services; Tel Aviv Israel
5. Siaal Research Center for Family Medicine and Primary Care; Faculty of Health Sciences; Ben-Gurion University of the Negev; Beer-Sheva Israel
6. Division of Applied Medicine; Aberdeen University; Aberdeen U.K
7. Department of Dermatology; Hospital Universitario Reina Sofía; Córdoba Spain
8. Centro Studi GISED; Fondazione per la Ricerca; Ospedale Maggiore Bergamo Italy
9. Department of Dermatology; Hospital Universitario Virgen de la Victoria; Málaga Spain
10. Dermatology Centre; Salford Royal NHS Foundation Trust; Salford U.K
11. Department of Dermatology; Beth Israel Deaconess Medical Center; Harvard Medical School; Boston MA U.S.A
12. Department of Dermatology; AULSS8; Ospedale San Bortolo; Vicenza Italy