1 Department of Anesthesiology, Columbia University Vagelos College of Physicians and Surgeons, New York, New York; Department of Epidemiology, Mailman School of Public Health, New York, New York.
2 Department of Anesthesiology, Pharmacology, Intensive Care, and Emergency Medicine, University Hospitals of Geneva, Geneva, Switzerland; Geneva Neuroscience Center, University of Geneva, Geneva, Switzerland.