Institution: | 1. Department of Anesthesiology, Perioperative and Pain Medicine, VA Palo Alto Health Care System, Palo Alto, California USA;2. Stanford University School of Medicine, Stanford, California USA;3. Department of Anesthesiology, Newport Harbor Anesthesia Consultants, Newport Beach, California USA;4. Department of Anesthesiology Duke University School of Medicine, Durham, North Carolina USA |