HLA-DQA1 and type 1 diabetes mellitus: As expected, alleles associated with T1D risk, particularly DRB1*03:01, DQA1*03:02, DQA1*05:01, DQB1*03:02, and DQB1*02:01 and associated haplotypes, were enriched in the training data participants relative to those in the external validation datasets.