1. Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, Texas, United States
2. Department of Applied Clinical Research, University of Texas Southwestern Medical Center, Dallas, Texas, United States
3. Advanced Imaging Research Center, University of Texas Southwestern Medical Center, Dallas, Texas, United States
4. Charles and Jane Pak Center for Mineral Metabolism and Clinical Research, University of Texas Southwestern Medical Center, Dallas, Texas, United States
5. Department of Radiology, University of Texas Southwestern Medical Center, Dallas, Texas, United States
6. Department of Clinical Nutrition, University of Texas Southwestern Medical Center, Dallas, Texas, United States
7. Department of Internal Medicine, University of Texas Health Science Center at Tyler, Tyler, Texas, United States
8. Department of Physiology, University of Texas Southwestern Medical Center, Dallas, Texas, United States