1. Center for Perioperative Optimization; Department of Surgery; Herlev Hospital; Herlev Ringvej 75 2730 Herlev Denmark
2. Faculty of Health and Medical Sciences; University of Copenhagen; Blegdamsvej 3B 2200 København N Denmark
3. Department of Surgery; Hvidovre Hospital; Kettegård Alle 30 2650 Hvidovre Denmark