1. Section of Endocrine Surgery, UCLA David Geffen School of Medicine, Los Angeles, California.
2. Division of Endocrinology and Diabetes: The Thyroid Center, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania.
3. Division of Endocrinology, Mayo School of Medicine, Jacksonville, Florida.
4. University of Pittsburgh Cancer Institute, Pittsburgh, Pennsylvania.
5. Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania.
6. University of California, San Francisco, San Francisco, California.
7. Department of Otolaryngology, Massachusetts Eye and Ear Infirmary/Massachusetts General Hospital, Boston, Massachusetts.
8. University of Cincinnati College of Medicine, Cincinnati, Ohio.