1. Lymphoid Malignancies Branch, Center for Cancer Research, National Cancer Institute, Bethesda, MD;
2. Hematology Unit, Bnai Zion Medical Center and
3. The Ruth and Bruce Rappaport Faculty of Medicine, Technion Haifa, Haifa, Israel;
4. Hematopathology Section, Laboratory of Pathology, Center for Cancer Research, National Cancer Institute, Bethesda, MD; and
5. Department of Hematology, Hadassah University, Hospital and Hebrew University Medical School, Jerusalem, Israel