Department of Anesthesiology, Mayo Clinic, Rochester, Minnesota.Department of Nutrition and Exercise Physiology, University of Missouri, Columbia, Missouri.Department of Anesthesiology, Mayo Clinic, Rochester, Minnesota.Department of Exercise and Nutrition Sciences, University at Buffalo, Buffalo, New York.Department of Anesthesiology, Mayo Clinic, Rochester, Minnesota.Department of Anesthesiology, Mayo Clinic, Rochester, Minnesota.Department of Anesthesiology, Mayo Clinic, Rochester, Minnesota.Institute for Integrative Physiology, School of Medicine, University of Chicago, Chicago, Illinois.Department of Anesthesiology, Mayo Clinic, Rochester, Minnesota.