1. Copenhagen University Hospital Hvidovre; Gastrounit, Medical Division; Hvidovre Denmark
2. Division of Medicine, Royal Free Campus, University College London; UCL Institute for Liver & Digestive Health; Rowland Hill Street Hampstead London UK NW3 2PF
3. Aarhus University Hospital; Department of Hepatology and Gastroenterology; Nørrebrogade 44 Aarhus 8200 N Denmark
4. The Parker Institute, Bispebjerg and Frederiksberg Hospital; Musculoskeletal Statistics Unit; Copenhagen --- Select One --- Denmark 2000 F
5. Bispebjerg and Frederiksberg Hospital; Musculoskeletal Statistics Unit, The Parker Institute; Copenhagen Denmark