Kaplan-Meier plots of relapse-free survival (RFS) probabilities for patients in conventional CR and CRB groups. In the CR group, there have been 355 events among 427 patients, with a median follow-up time of 106.5 weeks in the censored patients. In the CRB group, there have been 81 events among 106 patients, with a median follow-up time of 121 weeks in the censored patients. Log-rank test, P = .09.