A separate Turkish study identified elevated frequencies of the DRB1*04 and DRB1*07 alleles in patients categorized as high risk and standard risk, respectively (p = 0.009 and p = 0.007), indicating that DRB1*04 may predispose individuals to acute lymphoblastic leukemia (ALL). Here, HLA-DRB1 is linked to acute lymphoblastic leukemia.