RXRA and chronic myelogenous leukemia, BCR-ABL1 positive: Treatment of healthy PBMNCs with RXRA ligands 9cRA, bexarotene, and acitretin in combination with IM did not reduce cell viability compared to IM alone, suggesting that the cytotoxic effect of RXRA ligands in combination with imatinib is specific to CML cells (Supplementary Figures S4A–C).