Initial evaluation of Daratumumab regiment in treatment of 13 RRMM patients in Cho Ray Hospital from 1st January 2019 to 31st July 2022 Subjects and Methods: Subjects: All RRMM patients received therapy with Daratumumab at Hematology Deparment at Cho Ray Hospital from 1st January 2019 to 31st July 2022 Methods: Descriptive and observational study Results: From 1st January 2019 to 31st July 2022, at Cho Ray hospital, we had 13 RRMM patients who treated with Daratumumab regimens enrolled in the study.