1Department of Physiology and Biophysics, Keck School of Medicine, University of Southern California, Los Angeles, California, USA
2Department of Medicine, Keck School of Medicine, University of Southern California, Los Angeles, California, USA
3Department of Ob/Gyn and Physiology and Biophysics, Keck School of Medicine, University of Southern California, Los Angeles, California, USA
4Clinical and Endocrinology Branch, National Institute of Diabetes and Digestive and Kidney Disease (NIDDK), National Institutes of Health, Bethesda, Maryland, USA
5Department of Radiology and Imaging Sciences, Nuclear Medicine, National Institutes of Health, Bethesda, Maryland, USA
6Nutrition, National Institutes of Health, Bethesda, Maryland, USA
7Department of Research and Evaluation, Kaiser Permanente Southern California Medical Group, Pasadena, California, USA
8Department of Preventive Medicine, Division of Biostatistics, Keck School of Medicine, University of Southern California, Los Angeles, California, USA