- Patients (SWOG institutions only) must be registered on S9910, "Leukemia Centralized Reference Laboratories and Tissue Repositories, Ancillary;" specimens of peripheral blood and bone marrow must be submitted to the Southwest Oncology Group Lymphoid Leukemia and CML Centralized Laboratory in Seattle, Washington; collection of pretreatment blood and marrow specimens must be completed within 28 days prior to registration; note that this study also requires submission of peripheral blood and bone marrow specimens at various times after entry into the study