1. Department of Surgery, Donald W. Reynolds Cardiovascular Clinical Research Center, The University of Texas Southwestern Medical Center at Dallas, Dallas, Texas.
2. Center for Human Nutrition, Donald W. Reynolds Cardiovascular Clinical Research Center, The University of Texas Southwestern Medical Center at Dallas, Dallas, Texas.
3. Departments of Internal Medicine, and Clinical Nutrition, Center for Human Nutrition, Donald W. Reynolds Cardiovascular Clinical Research Center, The University of Texas Southwestern Medical Center at Dallas, Dallas, Texas.
4. The Metabolic Unit of the Veterans Affairs Medical Center at Dallas, Dallas, Texas.