1. Thyroid Cancer Research Laboratory, Unit of Endocrine Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts.
2. Division of Cancer Biology and Angiogenesis, Department of Pathology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts.
3. Endocrine Pathology, Department of Pathology, Brigham and Women's Hospital; Harvard Medical School, Boston, Massachusetts.