OA-56 Single Cell Analyses of Bone Marrow Immune Microenvironment in RRMM Subjects Treated with MEK1/2 Inhibitors Reveal IRF1-Mediated IFN/PDL1 Signaling Axes - Acharya, Chaitanya; Jayasinghe, Reyka; Hamilton, Mark; Gnjatic, Sacha; Kim-Schulze, Seunghee; Cho, Hearn; Kumar, Shaji; Mulligan, George (Clinical lymphoma, myeloma and leukemia, 2024)