1. Cleveland Clinic Foundation; Cleveland Ohio
2. Memorial Sloan Kettering Cancer Center; New York New York
3. Fox Chase Cancer Center; Philadelphia Pennsylvania
4. University of Nebraska Medical Center; Omaha Nebraska
5. Institut de Cancerologie Gustave Roussy; Villejuif France
6. Thyroid Center of New Hampshire; Nashua New Hampshire
7. Massachusetts Eye and Ear Infirmary; Harvard Medical School; Boston Massachusetts