1. Chang Gung Memorial Hospital; Department of Dermatology and Centre for Evidence-Based Medicine; 6, Sec West, Chia-Pu Road Puzih Chiayi Taiwan 61363
2. University of Tübingen; Institute of General Medicine and Interprofessional Care; Tübingen Germany
3. University of Oxford; Nuffield Department of Clinical Medicine; Oxford UK
4. University of Nottingham; c/o Cochrane Skin Group; Room A103, King's Meadow Campus Lenton Lane Nottingham UK NG7 2NR
5. Heatherwood & Wexham Park NHS Foundation Trust; Department of Dermatology, Wexham Park Hospital; Wexham Street Slough UK SL2 4HL
6. St Thomas' Hospital; St John's Institute of Dermatology; Westminster Bridge Road London UK SE1 7EH