KIR3DL1 and precursor B-cell acute lymphoblastic leukemia: A recent study in China showed that centromeric KIR cluster (KIR2DS2-2DL2-2DS3-2DL5) was significantly increased in children with B-cell acute lymphoblastic leukemia (B-ALL) compared to healthy controls and provided the first evidence that this gene cluster might increase the susceptibility to B-ALL in Chinese Han children [74].