HLA-DPB1 and acute lymphoblastic leukemia: Ninety per cent of ALL cases with this haplotype were positive for DPB1*06∶01 (Table 2), consistent with our earlier finding that HLA-DPB1*06∶01 is significantly associated with T-ALL (Odds ratio, 95% confidence interval 10.0, 3.3–30.2; [13]), but not supportive of an association of this allele with BCP-ALL.