1. Office of Research and Development, Clinical Sciences Research and Development (CSR&D), United States Department of Veterans Affairs Veterans Health Administration, Tennessee Valley Healthcare System Nashville Tennessee USA
2. Division of Diabetes, Endocrinology and Metabolism, Department of Medicine Vanderbilt University Medical Center Nashville Tennessee USA
3. Department of Medicine Vanderbilt Translational and Clinical Cardiovascular Research Center Nashville Tennessee USA
4. Division of Cardiovascular Medicine, Department of Medicine Vanderbilt University Medical Center Nashville Tennessee USA
5. Department of Molecular Physiology and Biophysics Vanderbilt University Nashville Tennessee USA
6. Department of Internal Medicine UT Southwestern Medical Center Dallas Texas USA