1. a Thyroid Cancer Research Laboratory, Endocrine Surgery Unit, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
2. e Division of Cancer Biology and Angiogenesis, Department of Pathology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA
3. b Department of Pathology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA;
4. c Department of Pathology, University of Massachusetts, Worcester, Massachusetts, USA;
5. d Plexxikon Inc., Berkeley, California, USA;