Department of Anesthesia, Stanford University School of Medicine, Stanford, California, United States of America. druau@stanford.edu|Department of Anesthesia, Stanford University School of Medicine, Stanford, California, United States of America. druau@stanford.edu|Department of Anesthesia, Stanford University School of Medicine, Stanford, California, United States of America. druau@stanford.edu|Department of Anesthesia, Stanford University School of Medicine, Stanford, California, United States of America. druau@stanford.edu|Department of Anesthesia, Stanford University School of Medicine, Stanford, California, United States of America. druau@stanford.edu|Department of Anesthesia, Stanford University School of Medicine, Stanford, California, United States of America. druau@stanford.edu|Department of Anesthesia, Stanford University School of Medicine, Stanford, California, United States of America. druau@stanford.edu|Department of Anesthesia, Stanford University School of Medicine, Stanford, California, United States of America. druau@stanford.edu|Department of Anesthesia, Stanford University School of Medicine, Stanford, California, United States of America. druau@stanford.edu