1. Centre for Pharmacoepidemiology and Drug Safety Division of Pharmacy and Optometry School of Health Sciences Faculty of Biology, Medicine and Health The University of Manchester Manchester U.K
2. Dermatology Centre Salford Royal NHS Foundation Trust The University of Manchester Manchester Academic Health Science Centre Manchester U.K
3. Division of Musculoskeletal and Dermatological Sciences School of Biological Sciences Faculty of Biology, Medicine and Health The University of Manchester Manchester U.K
4. NIHR Manchester Biomedical Research Centre Faculty of Biology, Medicine and Health The University of Manchester Manchester U.K
5. Arthritis Research U.K. Centre for Epidemiology Division of Musculoskeletal and Dermatological Sciences Faculty of Biology, Medicine and Health The University of Manchester Manchester U.K
6. St John's Institute of Dermatology Guy's and St Thomas’ NHS Foundation Trust London U.K
7. Institute of Cellular Medicine, Medical School Faculty of Medical Sciences Newcastle University Newcastle upon Tyne U.K
8. NIHR Newcastle Biomedical Research Centre Faculty of Medical Sciences Newcastle University Newcastle upon Tyne U.K
9. Department of Dermatology Royal Victoria Infirmary Newcastle upon Tyne Hospitals NHS Foundation Trust Newcastle upon Tyne U.K