1. Centre for Perioperative Optimisation Department of Surgery Herlev and Gentofte Hospital University of Copenhagen Borgmester Ib Juuls Vej 1 DK-2730 Herlev Denmark
2. Department of Clinical Epidemiology, Aarhus University Hospital, Aarhus, Denmark
3. Department of Surgery, Randers Regional Hospital, Randers, Denmark
4. Centre for Perioperative Optimisation, Department of Surgery, Herlev and Gentofte Hospital, University of Copenhagen, Herlev, Denmark