1. Department of Anaesthesiology and Pain Medicine, Inselspital, Bern University Hospital, University of Bern, 3010 Bern, Switzerland
2. University Institute of Clinical Chemistry, Inselspital, Bern University Hospital, University of Bern, 3010 Bern, Switzerland
3. Department of Anaesthesiology, Pain- and Rescue-Medicine, Cantonal Hospital of St. Gallen, 9007 St. Gallen, Switzerland
4. Department of Cardiology, Bern University Hospital, University of Bern, 3010 Bern, Switzerland