CCR2 and acute myeloid leukemia: Fig 2A shows the percentage CCR2 expression in 15 BM AML patient samples analyzed by FCM with positive CCR2 expression (Table 1). From the 15 BM AML patient samples, we had available for some patients PB samples which were also analyzed for CCR2 expression by FCM (Fig 2C). Fig 2B (BM sample) and 2D (PB sample) show FCM histograms of patient 2 analyzed for CCR2 expression.