HLA-DRB1 and type 1 diabetes mellitus: Two alleles (HLA-DRB1*04:03 and *04:07) were negatively associated with T1D (i.e., protective) with OR04:03 = 0.12 (p = 9.18×10−4) and OR04:07 = 0.11 (p = 4.23×10−4).