Prognostic scores for OS and EFS. Kaplan-Meier plots depicting a prognostic score for OS (A,C,E) and EFS (B,D,F) in patients with AML1-ETO (A-B), CBFB-MYH11 (C-D), and PML-RARA (E-F) fusion transcripts considering the 75th percentile of the mean initial transcription ratio and the median transcription ratio after 3 to 4 months as thresholds. Two prognostically different groups can be defined with 100% survival for the better group.