Time course plot of GVL response of all patients included in this study. Quantitative RT-PCR data are given as the bcr-abl ratio. Connecting lines crossing the X-axis indicate a PCR-negative follow-up sample. (⧫) Patient no. 1; (○) patient no. 2; (▴) patient no. 3; (▵) patient no. 4; (•) patient no. 5; (▾) patient no. 6; (▪) patient no. 7; (▿) patient no. 8.