1. Charité - Universitätsmedizin Berlin; Division of Evidence Based Medicine, Department of Dermatology, Venerology and Allergology; Charitéplatz 1 Berlin Germany 10117
2. Federal Joint Committee (G-BA, Gemeinsamer Bundesausschuss); Department of Medical Consulting; Wegelystrasse 8 Berlin Germany 10623
3. Faculty of Medicine Carl Gustav Carus, Technischen Universität (TU) Dresden; Center for Evidence-Based Healthcare; Fetscherstr. 74 Dresden Germany 01307
4. The University of Nottingham; c/o Cochrane Skin Group; A103, King's Meadow Campus Lenton Lane Nottingham UK NG7 2NR