1 Department of General Internal Medicine, Conquest Hospital, East Sussex Healthcare NHS Trust, St Leonards-on-Sea, East Sussex, UK.
2 Departments of General Internal Medicine and Gastroenterology, Conquest Hospital, East Sussex Healthcare NHS Trust, St Leonards-on-Sea, East Sussex, UK.
3 Department of Gastroenterology, Conquest Hospital, East Sussex Healthcare NHS Trust, St Leonards-on-Sea, East Sussex, UK.