1. Department of Dermatology; Complexo Hospitalario de Pontevedra (CHOP); Pontevedra; Research Unit; Fundación Academia Española de Dermatología; Madrid; Spain
2. German Center for Health Services Research in Dermatology; University Clinics of Hamburg; Hamburg; Germany
3. Department of Dermatology; Beth Israel Deaconess Medical Center; Harvard Medical School; Boston; MA; U.S.A
4. Department of Dermatology; Roskilde Hospital; Roskilde; Denmark
5. Department of Quality Measures and Research; Clalit Health Services; Tel Aviv and Siaal Research Center for Family Medicine and Primary Care; Faculty of Health Sciences; Ben-Gurion University of the Negev; Beer-Sheva; Israel
6. Department of Dermatology; Skin and Cancer Foundation; St Vincent's Hospital Melbourne; University of Melbourne; Melbourne; VIC; Australia
7. Department of Dermatology; Academic Medical Centre; University of Amsterdam; Amsterdam; the Netherlands
8. Centro Studi GISED; Fondazione per la Ricerca; Ospedale Maggiore; Bergamo; Italy