Overall survival (OS) and relapse-free survival (RFS) estimates. The median OS is 1.60 years (95% CI, 0.94 to 5.00 years) and the median RFS is 1.15 years (95% CI, 0.63 to 3.07 years). The median follow-up time of OS and RFS are 3.34 years (95% CI, 2.51 to 3.87 years) and 3.25 years (95% CI, 2.51 to 3.87 years), respectively.