P1161: ASPEN: LONG-TERM FOLLOW-UP RESULTS OF A PHASE 3 RANDOMIZED TRIAL OF ZANUBRUTINIB (ZANU) VS IBRUTINIB (IBR) IN PATIENTS (PTS) WITH WALDENSTRÖM MACROGLOBULINEMIA (WM). (23rd June 2022) - Dimopoulos, M.; Opat, S.; D'Sa, S.; Jurczak, W.; Lee, H.-P.; Cull, G.; Owen, R. G.; Marlton, P.; Wahlin, B. E.; Garcia-Sanz, R.; McCarthy, H.; Mulligan, S.; et al.