Affiliation: | 1. Anesthesiology and Perioperative Care Service, Veterans Affairs Palo Alto Health Care System, 3801 Miranda Avenue (112A), Palo Alto, CA 94304, USA;2. Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University School of Medicine, 300 Pasteur Drive, Room H3580, Stanford, CA 94305, USA;3. Department of Anesthesiology, Virginia Mason Medical Center, 1100 Ninth Avenue, Seattle, WA 98101, USA |