1. Department of Colorectal Surgery Western General Hospital Edinburgh UK
2. Colorectal Surgery Center Massachusetts General Hospital Boston Massachusetts USA
3. Department of Surgery University Hospital Erlangen Erlangen Germany
4. Department of Gastroenterological Surgery University Hospital of North Norway Tromsoe Norway
5. Centre for Colorectal Disease St Vincent's University Hospital Dublin Ireland
6. Sir Alan Parks Physiology Unit St Mark's Hospital Harrow UK