HDAC9 and chronic myelogenous leukemia, BCR-ABL1 positive: Amiri et al. investigates the effects of different bone marrow stromal cells (BMSCs) on the induction of quiescence and tested the advantage of pan-HDAC inhibitor panobinostat in the induction of apoptosis and targeting the quiescence cells of APL-derived (NB4) and CML-derived (K562) cell lines [27].