1. Department of Medicine, Vejle Hospital, Lillebaelt Hospital, University Hospital of Southern Denmark, Beriderbakken 4, DK 7100 Vejle, Denmark
2. Department of Regional Reseacrh, University of Southern Denmark, J.B. Winsløvsvej 19, DK 5000 Odense, Denmark
3. Department of Anaesthesiology and Intensive Care, Vejle Hospital, Lillebaelt Hospital, University Hospital of Southern Denmark, Beriderbakken 4, DK 7100 Vejle, Denmark
4. Department of Anaesthesiology and Intensive Care, Kolding Hospital, Lillebaelt Hospital, University Hospital of Southern Denmark, Sygehusvej 24, DK 6000 Kolding, Denmark