Chronic Phase Chronic Myelogenous Leukemia, BCR-ABL1 Positive | Blasts Under 15 Percent of Bone Marrow Nucleated Cells | Blasts Under 15 Percent of Peripheral Blood White Cells | Blasts Under 30 Percent of Bone Marrow Nucleated Cells | Blasts Under 30 Percent of Peripheral Blood White Cells