1. Department of Dermatology; Hôpital Henri Mondor; Créteil France
2. Clinical Investigation Centre; Hôpital Henri Mondor; Créteil France
3. Epidemiology in Dermatology and Evaluation of Therapeutics (EpiDermE) - EA 7379; Université Paris Est Créteil (UPEC); Créteil France
4. Université de Paris, Centre of Research in Epidemiology and Statistics (CRESS), INSERM, F-75004; Paris France
5. Cochrane France; Paris France
6. Department of Dermatology; Complexo Hospitalario Universitario de Vigo; Vigo Spain
7. c/o Cochrane Skin Group; The University of Nottingham; Nottingham UK
8. Centro Studi GISED (Italian Group for Epidemiologic Research in Dermatology) - FROM (Research Foundation of Ospedale Maggiore Bergamo); Padiglione Mazzoleni - Presidio Ospedaliero Matteo Rota; Bergamo Italy
9. Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin; Humboldt-Universität zu Berlin; Berlin Germany