1. Division of Hematology and Oncology, Department of Internal Medicine, Comprehensive Cancer Center, The Ohio State University, Columbus;
2. Cancer and Leukemia Group B Statistical Center, Duke University Medical Center, Durham, NC;
3. Comprehensive Cancer Center, Wake Forest University, Winston-Salem, NC;
4. University of Iowa, Iowa City;
5. North Shore University Hospital, Manhasset, NY;
6. Roswell Park Cancer Institute, Buffalo, NY;
7. University of Alabama, Birmingham;
8. University of Maryland, Baltimore;
9. Duke University Medical Center, Durham, NC; and
10. University of Chicago, IL