P1189: INITIAL SAFETY RUN-IN RESULTS OF THE PHASE III POLARGO TRIAL: POLATUZUMAB VEDOTIN PLUS RITUXIMAB, GEMCITABINE, AND OXALIPLATIN IN PATIENTS WITH RELAPSED/REFRACTORY DIFFUSE L... Dahkki A. McMillan, C. Haioun, J.-M. Sancho, A. Viardot, A. Rodriguez Izquierdo, E. M. Donato Martin, A. M. García-Sancho, J. Sandoval-Sus, H. Tilly, E. Vandenberghe, J. Hirata, P. Choudhry, Y. M. Chang, L. Musick, M. Matasar

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