1. Division of Hematologic Malignancies and Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA;
2. Department of Pathology, Brigham and Women's Hospital, Boston, MA;
3. Division of Hematology/Oncology, Department of Medicine, University of California, San Diego, La Jolla, CA;
4. CLL Research Consortium, Moores UCSD Cancer Center, La Jolla, CA;
5. Center for Lymphoma, Massachusetts General Hospital Cancer Center, Boston, MA;
6. Division of Hematology/Oncology, Beth Israel Deaconess Medical Center, Boston, MA; and
7. Department of Biostatistics and Computational Biology, Dana-Farber Cancer Institute, Boston, MA