1 Centre of Evidence Based Dermatology, University of Nottingham, Nottingham, United Kingdom; NIHR Nottingham Biomedical Research Centre (BRC), Nottingham University Hospitals NHS Trust and the University of Nottingham, Nottingham, United Kingdom. Electronic address: [email protected].
2 Department of Non-communicable Disease Epidemiology, London School of Hygiene and Tropical Medicine, London, United Kingdom.
3 Department of Dermatology, University of California, San Francisco (UCSF), San Francisco, Calif.
4 Centre of Evidence Based Dermatology, University of Nottingham, Nottingham, United Kingdom.
5 NIHR Nottingham Biomedical Research Centre (BRC), Nottingham University Hospitals NHS Trust and the University of Nottingham, Nottingham, United Kingdom; Arthritis Research UK Primary Care Centre, Research Institute for Primary Care & Health Sciences, Keele University, Staffordshire, United Kingdom.
6 Health Economics Group, University of East Anglia, Norwich, United Kingdom.
7 Primary Care & Population Sciences, University of Southampton, Southampton, United Kingdom.