EFS. (A) EFS based on CR, treatment failure, or all-cause death. (B) EFS based on CRc, treatment failure, or all-cause death. Tick marks indicate censored data. EFS is defined as the time from the date of randomization until the date of documented relapse from CR (panel A) or CRc (panel B), treatment failure (failure to achieve CR within 6 cycles of treatment), or all-cause death, whichever occurred first. NE, not estimable.