A S W Lee1, N J Levell1, S N Shah1, K Gaffney2, M A W Tremelling3. 1. Department of Dermatology, Norfolk and Norwich University Hospital, Colney Lane, Norwich, NR4 7UY, UK. 2. Department of Rheumatology, Norfolk and Norwich University Hospital, Colney Lane, Norwich, NR4 7UY, UK. 3. Department of Gastroenterology, Norfolk and Norwich University Hospital, Colney Lane, Norwich, NR4 7UY, UK.