Affiliation: | Royal Free Unit for Endoscopy and Centre for Gastroenterology, The Royal Free Hospital and University College London Institute for Liver and Digestive Health, London, United Kingdom;Royal Free Unit for Endoscopy and Centre for Gastroenterology, The Royal Free Hospital and University College London Institute for Liver and Digestive Health, London, United Kingdom;Department of Gastroenterology and Hepatology, Nagoya University Graduate School of Medicine, Nagoya, Japan;Royal Free Unit for Endoscopy and Centre for Gastroenterology, The Royal Free Hospital and University College London Institute for Liver and Digestive Health, London, United Kingdom;Department of Medicine, Division of Gastroenterology, Jichi Medical University, Shimotsuke, Japan;Royal Free Unit for Endoscopy and Centre for Gastroenterology, The Royal Free Hospital and University College London Institute for Liver and Digestive Health, London, United Kingdom |