1. Memorial Sloan Kettering Cancer Center, New York, NY;
2. John P. Leonard Department of Medicine, Weill Cornell Medicine, New York, NY;
3. Alliance Statistics and Data Center, Duke University, Durham, NC;
4. Department of Radiology, Mount Sinai Medical School, New York, NY;
5. Department of Radiation Oncology, Ohio State University Medical Center, Columbus, OH;
6. Cleveland Clinic, Cleveland, OH;
7. City of Hope, Duarte, CA;
8. University of Wisconsin School of Medicine and Public Health, Madison, WI;
9. Division of Medical Oncology, Washington University School of Medicine, St. Louis, MO;
10. University of Rochester Medical Center, Rochester, NY; and
11. Georgetown University Hospital, Washington, DC