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For those of you treating cells with DTT for patients taking daratumumab/darzalex: Have you come across a positive autocontrol, with treated and untreated cells? Currently, patient on DARA: initial screen-panagglutinin, auto-positive. Testing with treated cells: screen-negative, auto-positive. QC-valid (testing Kpos and Epos cell) antigen typing for K-neg, E-pos I have been unable to find any research with this information. We are currently in the process of validating DTT treatment. Any advice would be welcomed. Thank you