1. Department of Neurology Zealand University Hospital Roskilde Denmark
2. Department of Anesthesiology, North Zealand Hospital University of Copenhagen Copenhagen Denmark
3. Department of Regional Health Research University of Southern Denmark Odense Denmark
4. Department of Thoracic Anaesthesiology Rigshospital Copenhagen Denmark
5. Department of Cardiology Zealand University Hospital Roskilde Denmark
6. Department of Anesthesiology Holbaek Hospital Holbaek Denmark