1. Dana-Farber Cancer Institute , Boston, MA, USA
2. Dartmouth Hitchcock Medical Center , Lebanon, NH, USA
3. Lifespan Cancer Institute and Brown University , Providence, RI, USA
4. West Virginia University Cancer Center , Morgantown, WV, USA
5. Maine Medical Center , Portland, ME, USA
6. Baptist Medical Center , Memphis, TN, USA
7. National Cancer Institute , Rockville, MD, USA
8. Memorial Sloan Kettering Cancer Center , New York, NY, USA