P1087: PIRTOBRUTINIB IN COVALENT BTK-INHIBITOR PRE-TREATED MANTLE CELL LYMPHOMA: UPDATED RESULTS AND SUBGROUP ANALYSIS FROM THE PHASE 1/2 BRUIN STUDY WITH >3 YEARS FOLLOW-UP FROM START OF ENROLLMENT - Wojciech Jurczak; Pier Luigi Zinzani; Toby A. Eyre; Chan Y. Cheah; Chaitra S. Ujjani; Koji Izutsu; Shuo MA; Ian Flinn; Alvaro J. Alencar; David Lewis; Krish Patel; Kami Maddocks; et al. (HemaSphere, 2023)