1. Office of Clinical Pharmacology, Office of Translational Sciences, Center for Drug Evaluation and Research, U.S. Food and Drug Administration, Silver Spring, Maryland.
2. Section of Endocrinology, MedStar Washington Hospital Center, Washington, DC.
3. Departments of Medicine, Oncology, Physiology, and Biophysics, Georgetown University Medical Center, Washington, DC.
4. Division of Endocrinology, Georgetown University Medical Center, Washington, DC.