J Dobson1, C Ondhia2, A-M Skellett3, R Coelho3. 1. Department of Dermatology, Norfolk and Norwich University Hospitals NHS Foundation Trust, Norwich, U.K.. jsdobson@doctors.org.uk. 2. Department of Dermatology, St Mary's Hospital, Imperial College Healthcare NHS Trust, Praed St, London, W2 1NY, U.K. 3. Department of Dermatology, Norfolk and Norwich University Hospitals NHS Foundation Trust, Norwich, U.K.