1. Department of Anaesthesiology and Intensive Care Medicine, Copenhagen University Hospital Hvidovre, Hvidovre, Denmark;
2. Department of Intensive Care, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark;
3. Department of Gastroenterology, Surgical Unit, Copenhagen University Hospital Hvidovre, Hvidovre, Denmark;
4. Department of Anaesthesiology and Intensive Care Medicine, Nordsjællands Hospital, Copenhagen University Hospital, Hillerød, Denmark