S1605 HORIZON (OP‐106): UPDATED EFFICACY AND SAFETY OF MELFLUFEN IN RELAPSED/REFRACTORY MULTIPLE MYELOMA (RRMM) REFRACTORY TO DARATUMUMAB (DARA) AND/OR POMALIDOMIDE (POM)Paul G. Richardson, M.‐V. Mateos, Alessandra Larocca et al.|HemaSphere|2019Cited by 2