1. University of Birmingham; Institute of Applied Health Research; Birmingham UK B15 2TT
2. Churchill Hospital; Department of Dermatology; Old Road Headington Oxford UK OX3 7LJ
3. The University of Sydney; Sydney School of Public Health; Edward Ford Building A27 Sydney NSW Australia 2006
4. Nottingham University Hospitals NHS Trust; Department of Oncology; City Hospital Campus Nottingham City Hospital NHS Trust Campus, Hucknall Road Nottingham UK NG5 1PB
5. The University of Nottingham; c/o Cochrane Skin Group; Nottingham UK
6. The University of Nottingham; Centre of Evidence Based Dermatology; Queen's Medical Centre Derby Road Nottingham UK NG7 2UH