1. Department of Pediatrics, Uniformed Services University of the Health Sciences, Bethesda, Maryland.
2. Department of Clinical Investigation, Walter Reed Army Medical Center, Washington, D.C.
3. Biomedical Instrumentation Center, Uniformed Services University of the Health Sciences, Bethesda, Maryland.
4. Department of Endocrinology, Memorial Sloan Kettering Cancer Center, New York, NY.