1. Department of Anaesthesiology and Intensive Care Medicine Institute of Clinical Sciences at the Sahlgrenska Academy University of Gothenburg Gothenburg Sweden
2. Section of Cardiothoracic Anaesthesia and Intensive Care Sahlgrenska University Hospital Gothenburg Sweden
3. Department of Radiation Physics Institute of Clinical Sciences Sahlgrenska AcademyUniversity of Gothenburg Gothenburg Sweden
4. Department of Medical Physics and Biomedical Engineering Sahlgrenska University Hospital Gothenburg Sweden
5. Department of Laboratory Medicine Institute of Biomedicine Sahlgrenska AcademyUniversity of Gothenburg Gothenburg Sweden
6. Department of Anaesthesia and Intensive Care Helsingborg HospitalHelsingborg and Lund University Helsingborg Sweden
7. Department of Clinical Sciences Anaesthesiology Lund University Lund Sweden