1. Department of Internal Medicine; VA North Texas Health Care System; University of Texas Southwestern Medical Center; Dallas; TX; USA
2. Program in Reproductive and Adult Endocrinology; Eunice Kennedy Shriver National Institute of Child Health & Human Development; National Institutes of Health; Bethesda; MD; USA
3. Department of Cell Biology; University of Texas Southwestern Medical Center; Dallas; TX; USA
4. Department of Pathology; University of Texas Southwestern Medical Center; Dallas; TX; USA
5. Simmons Cancer Center; University of Texas Southwestern Medical Center; Dallas; TX; USA