1. 1Department of Internal Medicine, University Hospital and University of Zurich, Zurich, Switzerland.
2. 2Institute of Anesthesiology, University Hospital and University of Zurich, Zurich, Switzerland.
3. 3Department of Internal Medicine, University Hospital and University of Zurich, Zurich, Switzerland.
4. 4Department of Internal Medicine, University Hospital and University of Zurich, Zurich, Switzerland.
5. 5Division of Cardiovascular Anesthesia, Department of Anesthesiology, University of Maryland School of Medicine, Baltimore, Maryland.
6. 6Department of Anesthesiology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma.
7. 7Department of Anesthesiology, Critical Care and Surgery, Duke University School of Medicine, Durham, North Carolina.
8. 8Center for Blood Oxygen Transport and Hemostasis, Department of Pediatrics, and Department of Pathology, University of Maryland School of Medicine, Baltimore, Maryland.