1. Department of Anaesthesiology and Intensive Care, Regionshospitalet Viborg, Heibergs Alle 5A, Viborg 8800, Denmark
2. Department of Internal Medicine, Randers Regional Hospital, Skovlyvej 15, Randers 8930, Denmark
3. Department of Anaesthesiology, Aarhus University Hospital, Palle Juul-Jensens Boulevard 99, Aarhus 8200, Denmark
4. Department of Clinical Medicine, Aarhus University, Palle Juul-Jensens Boulevard 82, Aarhus 8200, Denmark