P1159: A MULTICENTER, INTERNATIONAL COLLABORATIVE STUDY EVALUATING FRONTLINE THERAPY WITH BENDAMUSTINE RITUXIMAB FOR WALDENSTRÖM MACROGLOBULINEMIA - S. Zanwar; J. Abeykoon; J. Castillo; E. Durot; E. Kastritis; E. Uppal; P. Morel; R. Tawfiq; L. Montes; J. Paludo; S. Sarosiek; S. Kumar; et al. (HemaSphere, 2022)