Evaluation of expansion, homing to the BM, and persistence of CD19-CAR_ALLO. Expansion and persistence of CD19-CAR_ALLO in the peripheral blood of the patients, evaluated via flow cytometry (A) and droplet PCR (B). Homing to the BM and persistence of CD19-CAR_ALLO, analyzed via flow cytometry (C) and droplet PCR (D). PCR, polymerase chain reaction.