Supplementary Figure 4 from PLK1 Inhibitors Synergistically Potentiate HDAC Inhibitor Lethality in Imatinib Mesylate–Sensitive or –Resistant BCR/ABL&lt;sup&gt;+&lt;/sup&gt; Leukemia Cells &lt;i&gt;In Vitro&lt;/i&gt; and &lt;i&gt;In Vivo&lt;/i&gt;