MRD status by PCR and by flow cytometry with follow-up. (A) MRD by time from therapy according to BCR-ABL/ABL percentage. The line connects the median values of the patients at the stated time points. Several patients at different time intervals had overlapping values. In 1 patient, BCR-ABL was undetectable at presentation by RT-qPCR and was detected by fluorescence in situ hybridization. (B) MRD by time from therapy according to multiparameter flow cytometry.