- Patients (Southwestern Oncology Group [SWOG] institutions only) must be registered on SWOG-9007, "Cytogenetic Studies in Leukemia Patients;" collection of the pretreatment bone marrow specimen must be completed within 28 days prior to registration; the pretreatment bone marrow specimen must be submitted to an approved Southwest Oncology Group Cytogenetics Laboratory for cytogenetic analysis as described, and an aliquot of the bone marrow (or peripheral blood if the marrow aspiration is a dry tap) must be submitted for fluorescent in situ hybridization (FISH) analysis; note that protocol SWOG-9007 also requires submission of bone marrow specimens at the time of progression to the accelerated or blastic phase of CML or the loss of complete hematologic response and every six months while the patient is on this study