We measured BCL-2 and MCL-1 using RNA from 117 CD2+cell-depleted primary samples and show here that there is no trend for primary AML samples to group into distinct MCL1-over-expressing and BCL-2-overexpressing samples (Spearman's rho = -0.11, not significant, Figure 6A). This evidence concerns the gene MCL1 and acute myeloid leukemia.