1. Department of Dermatology; Faculty of Health Sciences; University Hospital of North Norway; St Olavsgate 70 9406 Harstad Norway
2. Departments of Dermatology, Venereology, Allergology and Immunology; Dessau Medical Center; Dessau Germany
3. Faculty of Medicine; Memorial University of Newfoundland; St John's NL Canada
4. Department of Quality Measurements and Research; Chief Physician's Office; Clalit Health Services; Tel-Aviv Israel
5. Division of Community Health; Faculty of Health Sciences; Siaal Research Center for Family Medicine and Primary Care; Ben-Gurion University of the Negev; Beer-Sheva Israel
6. Department of Dermatology; Henri-Mondor Hospital, APHP; University Paris Est Creteil; Creteil France
7. Department of Dermatology; Health Sciences Faculty; Roskilde Hospital; University of Copenhagen; Copenhagen Denmark