1. Department of Internal Medicine, Division of Endocrinology, University of Texas Southwestern Medical Center, Dallas, Texas 75390, United States
2. Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, Texas 75390, United States
3. Harold C. Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas, Texas 75390, United States
4. Program in Molecular Medicine, University of Texas Southwestern Medical Center, Dallas, Texas 75390, United States