1. Lennard Jones Intestinal Failure Unit, St Mark's Hospital, Harrow and in the Division of Surgery, Oncology, Reproductive Biology and Anaesthetics at Imperial College, London,
2. Lennard Jones Intestinal Failure Unit, St Mark's Hospital, Harrow and
3. Lennard Jones Intestinal Failure Unit, St Mark's Hospital, Harrow HA1 3UJ and Honorary Senior Lecturer in the Division of Surgery, Oncology, Reproductive Biology and Anaesthetics, Imperial College, London