1. Department of Dermatology; Norfolk and Norwich University Hospital NHS Foundation Trust; Norwich NR4 7UY U.K
2. Department of Dermatology; Warwick Hospital; South Warwickshire NHS Foundation Trust; Warwick CV34 5BW U.K
3. Department of Dermatology; University Hospital Coventry; University Hospitals Coventry and Warwickshire; Coventry CV2 2DX U.K
4. Department of Dermatology; Royal Victoria Infirmary; The Newcastle upon Tyne Hospitals NHS Foundation Trust; Newcastle upon Tyne NE1 4LP U.K
5. Department of Dermatology; Queen's Medical Centre; Nottingham University Hospitals NHS Trust; Nottingham NG7 2UH U.K
6. Centre of Evidence Based Dermatology; University of Nottingham; Nottingham NG7 2RD U.K
7. Department of Vasculitis; Cambridge University Hospitals NHS Foundation Trust (Addenbrooke's); Cambridge CB2 0QQ U.K