H Kehlet1, C P Delaney2, A G Hill3. 1. Section for Surgical Pathophysiology, Rigshospitalet Copenhagen University, Rigshospitalet, Blegdamsvej 9, Copenhagen 2100, Denmark henrik.kehlet@regionh.dk. 2. Digestive Health Institute, University Hospitals Case Medical Center, Case Western Reserve University, Cleveland, USA. 3. Department of Surgery, Middlemore Hospital, University of Auckland, Auckland, New Zealand.