1. Department of Anaesthesiology Randers Regional Hospital Randers Denmark
2. Department of Anaesthesiology Hospital of Southern Jutland Aabenraa Denmark
3. Department of Surgery & Intensive Care Regional Hospital Central Jutland Viborg Denmark
4. Department of Anaesthesiology Aarhus University Hospital Aarhus Denmark
5. Department of Clinical Medicine Aarhus University Aarhus Denmark
6. Department of Cardiothoracic and Vascular Surgery, Anaesthesia Section Aarhus University Hospital Aarhus Denmark