Department of Molecular Biosciences, School of Veterinary Medicine, University of California Davis, Davis, CA 95616, USA. Division of Gastroenterology and Hepatology, Department of Internal Medicine, School of Medicine (V.M.), University of California Davis, Sacramento, CA 95817, USA. Department of Nutrition, University of California Davis, Davis, CA 95616, USA. Western Human Nutrition Research Center, Agricultural Research Service, USDA, Davis, CA 95616, USA. Osher Center for Integrative Medicine, School of Medicine, University of California San Francisco, San Francisco, CA 94155, USA. Department of Psychiatry, University of California San Francisco, San Francisco, CA 94143, USA. Basic Sciences, Touro University of California, Vallejo, CA 94592, USA.