1 Intestinal Failure Service, Department of Gastroenterology, University College London Hospitals NHS Foundation Trust, 250 Euston Road, London, NW1 2PG, United Kingdom.
2 Intestinal Failure Service, Department of Gastroenterology, University College London Hospitals NHS Foundation Trust, 250 Euston Road, London, NW1 2PG, United Kingdom. Electronic address: [email protected].