P1443: AUTOLOGOUS NK CELLS AS CONSOLIDATION AFTER FRONT-LINE STEM CELL TRANSPLANTATION IN MULTIPLE MYELOMA: A LONG-TERM FOLLOW-UP - J. Lund; H. Nahi; S. Meinke; P.-H. Holmqvist; H.-G. Ljunggren; J. Aschan; E. Alici (HemaSphere, 2022)