S180: RG6234, A NOVEL GPRC5D T-CELL ENGAGING BISPECIFIC ANTIBODY, INDUCES RAPID RESPONSES IN PATIENTS WITH RELAPSED/REFRACTORY MULTIPLE MYELOMA: PRELIMINARY RESULTS FROM A FIRST-IN-HUMAN TRIAL - C. Hasselbalch Riley; M. Hutchings; S.-S. Yoon; Y. Koh; S. Manier; T. Facon; S. J. Harrison; J. Er; F. Volzone; A. Pinto; C. Montes; E. M. Ocio; et al. (HemaSphere, 2022)