3.
CART分析后的3个终末亚组的PFS生存曲线，第2、3、4组的中位PFS分别为1个月、10个月、22个月。
Kaplan-Meier survival curves of the 3 terminal subgroups generated from the CART analysis. Median PFS of the second, third, and fourth subgroup is 1, 10, 22 months respectively.
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