 The BCR-ABL1 translocation is a hallmark of chronic myeloid leukemia.     ///    "Because patients treated with imatinib and other tyrosine kinase inhibitors achieve lower levels of detectable disease, quantitation of BCR-ABL1 transcripts with quantitative RT-PCR has become an essential tool in chronic myeloid leukemia monitoring. "    ///    Achieving defined levels of BCR-ABL1 on the International Scale within specific time frames is an important measure for assessing patient response and probability for relapse and progression.     ///    Molecular monitoring of chronic myeloid leukemia: international standardization of BCR-ABL1 quantitation.. 