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]. The gene discussed is HDAC9; the disease is acute promyelocytic leukemia.