1. Institute of Anesthesiology and Pain Therapy, Heart and Diabetes Center North Rhine-Westphalia, Ruhr University Bochum, Bad Oeynhausen, Germany
2. the Institute of Clinical Chemistry, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
3. the Department of Anesthesiology and Pain Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
4. the Departments of Anesthesiology, Critical Care, and Surgery, Duke University School of Medicine, Durham, North Carolina