P640: PIRTOBRUTINIB, A HIGHLY SELECTIVE, NON-COVALENT (REVERSIBLE) BTK INHIBITOR IN COMBINATION WITH VENETOCLAX±RITUXIMAB IN RELAPSED/REFRACTORY CLL: RESULTS FROM THE BRUIN PHASE 1... by L. E. Roeker, A. R. Mato, J. R. Brown, C. C. Coombs, N. N. Shah, W. G. Wierda, M. R. Patel, K. L. Lewis, M. Balbas, J. Zhao, N. C. Ku, J. F. Kherani, D. E. Tsai, B. Nair, C. Y. Cheah

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