However, in our recently performed extensive MS-based analysis of the primary CML immunopeptidome, we could not identify any naturally HLA-presented peptides encompassing BCR-ABL- or ABL-BCR-derived neoepitopes (68), keeping in mind that especially for MS-based immunopeptidomics, absence of evidence does not equal evidence of absence. Here, ABL1 is linked to chronic myelogenous leukemia, BCR-ABL1 positive.