1. Department of Surgery and Anaesthesia; Division of Medical Sciences and Graduate Entry Medicine, School of Medicine, University of Nottingham; Derby UK
2. Center for Perioperative Optimization, Department of Surgery; Herlev Hospital; Herlev Denmark
3. Division of Health Sciences, School of Medicine; University of Nottingham; Derby UK
4. Department of Surgery; Division of Medical Sciences and Graduate Entry Medicine, School of Medicine, University of Nottingham; Derby UK
5. Faculty of Medicine and Health Sciences; University of Nottingham; Nottinghamshire UK
6. Department of Surgery; Royal Alexandra Hospital; Paisley UK
7. Department of General Surgery; Taunton and Somerset NHS Foundation Trust; Taunton UK
8. Department of Surgery; Royal Derby Hospital; Derby UK
9. Department of Colorectal Surgery; Royal Derby Hospital; Derby UK