1. Division of Evidence Based Medicine (dEBM) Department of Dermatology Charité – Universitätsmedizin Berlin Charitéplatz 1 D‐10117 Berlin Germany
2. Dermatology Centre Salford Royal Hospital University of Manchester Manchester Academic Health Science Centre Manchester U.K.
3. Department of Dermatology Kings College Hospital London U.K.
4. Department of Dermatology Charité – Universitätsmedizin Berlin Berlin Germany
5. Department of Dermatology Yale Medical School New Haven CT U.S.A.