1. Leukemia Section, Roswell Park Cancer Institute, Buffalo, NY;
2. Cancer and Leukemia Group B (CALGB) Biostatistics, Duke University Medical Center, Durham, NC;
3. Duke University Medical Center, Durham, NC;
4. Marlene and Stewart Greenebaum Cancer Center, University of Maryland Cancer Center, Baltimore;
5. Wake Forest University School of Medicine, Winston-Salem, NC;
6. North Shore University Hospital, Manhasset, NY;
7. Ohio State University Comprehensive Cancer Center, Columbus;
8. University of Chicago, IL