1. The Dermatology Centre Salford Royal NHS Foundation Trust Manchester NIHR Biomedical Research Centre Manchester Academic Health Science Centre Manchester UK
2. Division of Musculoskeletal and Dermatological Sciences School of Biological Sciences Faculty of Biology, Medicine and Health The University of Manchester Manchester UK
3. Skin Patients Netherlands Nieuwerkerk a/d IJssel the Netherlands
4. Clinical Standards Unit British Association of Dermatologists London UK
5. Centre of Evidence Based Dermatology University of Nottingham UK
6. Department of Dermatology Chang Gung Memorial Hospital Linkou Taoyuan Taiwan
7. College of Medicine Chang Gung University Taoyuan Taiwan
8. Department of Dermatology Leiden University Medical Centre Leiden the Netherlands
9. Unit for Population‐Based Dermatology Research St John’s Institute of Dermatology King’s College London and Guy’s & St Thomas’ Hospital NHS Foundation Trust London UK