HLA-DRB1 and type 1 diabetes mellitus: Here, we found that both DRB1*04:01–DQB1*03:02 haplotypes including either DQA1*03:01 or DQA1*03:03 were associated with increased type 1 diabetes susceptibility with similar ORs of 6.18 and 4.90, respectively (Table 3).