P640: PIRTOBRUTINIB, A HIGHLY SELECTIVE, NON-COVALENT (REVERSIBLE) BTK INHIBITOR IN COMBINATION WITH VENETOCLAX±RITUXIMAB IN RELAPSED/REFRACTORY CLL: RESULTS FROM THE BRUIN PHASE 1B STUDY. (23rd June 2022) - Roeker, L. E.; Mato, A. R.; Brown, J. R.; Coombs, C. C.; Shah, N. N.; Wierda, W. G.; Patel, M. R.; Lewis, K. L.; Balbas, M.; Zhao, J.; Ku, N. C.; Kherani, J. F.; et al.