PFS and best response rate after PSM. (A) PFS after the infusion of CAR T cells according to histology (P = .0029). (B) Best response rate according to histology. Time-to-event data were assessed via Kaplan-Meier curves, and the estimated rates at specific time points were computed with 95% CIs via the Greenwood formula. Response rates are expressed as percentages with 95% CIs according to the exact Pearson-Clopper method and were compared via a χ² test. CR, complete response; PR, partial response.