HLA-DPA1 and type 1 diabetes mellitus: The frequency of HLA-DPA1*02:02 and DPB1*05:01 alleles and HLA-DPA1*02: 02-DPB1*05:01 haplotype were significantly higher in patients that presented with T1DM compared to controls (p = 0.022, p = 0.0027, p = 0.0093, respectively) and compared to the Japanese population.