Also, the CAR is co-expressed with a suicide mechanism (RQR8), which can be activated by using rituximab...Pts receive a lymphodepletion (LD) regimen of either fludarabine and cyclophosphamide (FC) or fludarabine, cyclophosphamide plus alemtuzumab (FCA) starting on Day -5, followed by an infusion of UCART123 at one of 5 dose levels on Day 0...DL1 has cleared safety without DLT, and enrollment at the next dose levels are proceeding. ClinicalTrials.gov Identifier: NCT03190278