BCR-ABL1 e6a2 transcript in chronic myeloid leukemia: biological features and molecular monitoring by droplet digital PCR..     ///     The BCR-ABL1 fusion on the Philadelphia (Ph) chromosome is a hallmark of chronic myeloid leukemia (CML).     ///    "More than 95 % of BCR-ABL1 transcripts in CML are either e13a2 or e14a2 (major breakpoint cluster region or M-bcr), whereas rare BCR-ABL1 transcripts are occasionally observed, accounting for less than 1 % of CML cases. "