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