Table 2 shows the gene frequencies of the HLA-B locus in patients with ALL as compared to controls. As it is readily seen, patients with ALL show increased gene frequency of the HLA-B*40 allele as compared to the control group (14.5% versus 9.84%, P = 0.003, OR = 1.67, CI 95% = 1.16–2.40); whereas the gene frequency of HLA-B*39 allele was lower when compared with controls (12.2% versus 17.3%, P = 0.004, OR = 0.61, CI 95% = 0.42–0.87). Here, HLA-B is linked to acute lymphoblastic leukemia.