CLINICAL ACTIVITY OF REGN1979, AN ANTI‐CD20 X ANTI‐CD3 BISPECIFIC ANTIBODY (AB) IN PATIENTS (PTS) WITH (W/) RELAPSED/REFRACTORY (R/R) B‐CELL NON‐HODGKIN LYMPHOMA (B‐NHL). (12th June 2019) - Topp, M.S.