KaplanMeier curves showing PFS of patients who received CAR19/IL-15 NK cell therapy derived from Opt-Cs ( n =16) versus Sub-Cs ( n =21). Tick marks indicate the times at which data were censored for a given patient. Numbers above each line represent the number of patients at risk. Numbers in parentheses represent the probabilities of OS or PFS at a given time point; mo, months. P values were determined by log-rank test, and the shaded areas represent 95% CI of survival probability.
