NCR1 and acute myeloid leukemia: To better characterize the association between the NKp44-1 expression levels and survival of AML patients, we further divided the NKp44-1 group by sorting in accordance with the expression levels of NKp44-1 (normalized to the expression of NCR1) by equally dividing into NKp44-1high (top half, n=12) and NKp44-1low (bottom half, n=12) subgroups.