1. Bispebjerg Hospital; Department of Clinical Pharmacology; Bispebjerg Bakke 23 Copenhagen NV Denmark 2400
2. Herlev Hospital, University of Copenhagen; Department of Surgery, Center of Perioperative Optimization; Herlev Ringvej 75 Herlev Denmark 2730
3. Copenhagen University Hospital, Roskilde and Koege; Department of Surgery; Lykkebaekvej 1 Koege Denmark 4600
4. Herlev and Gentofte Hospital, University of Copenhagen; The Cochrane Anaesthesia, Critical and Emergency Care Group; Herlev Ringvej Herlev Denmark 2730