1. T Mitchell:
Gastroenterology Unit, Warrington General Hospital, Cheshire, UK
2. E Christie:
Gastroenterology Unit, Warrington General Hospital, Cheshire, UK
3. Habib Syed:
Gastroenterology Unit, Llandudno General Hospital, North Wales, UK
4. A Koulaouzidis:
Gastroenterology Unit, Warrington General Hospital, Cheshire, UK
5. W C Tan:
Gastroenterology Unit, Warrington General Hospital, Cheshire, UK