Institution: | (1) Department of Surgical Gastroenterology, University Department of Surgery, Manchester Royal Infirmary, Oxford Road, Manchester M13 9WL, UK;(2) Department of Surgical Gastroenterology, University Department of Surgery, Manchester Royal Infirmary, Oxford Road, Manchester M13 9WL, UK;(3) Department of Surgical Gastroenterology, University Department of Surgery, Manchester Royal Infirmary, Oxford Road, Manchester M13 9WL, UK;(4) Department of Surgical Gastroenterology, University Department of Surgery, Manchester Royal Infirmary, Oxford Road, Manchester M13 9WL, UK;(5) Department of Surgical Gastroenterology, University Department of Surgery, Manchester Royal Infirmary, Oxford Road, Manchester M13 9WL, UK |