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OS (A) of the entire cohort and (B) according to treatment intensity post-RR-AML. BSC: best supportive care; CI: confidence interval; IT: intensive therapy; NIT: non-intensive therapy; NR: not reached; OS: overall survival; RR-AML: relapsed/refractory acute myeloid leukemia. *P<0.001 between IT, NIT, and BSC groups.
