1. National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland
2. Endocrine Section, Medstar Washington Hospital Center, Washington, DC
3. Institute of Head, Neck and Thyroid Cancer, Mount Sinai Beth Israel Medical Center, New York, New York
4. Department of Endocrinology and Cancer Center, Mayo Clinic, Jacksonville, Florida
5. Department of Surgery and Stanford Cancer Institute, Stanford University, Stanford, California