In accordance with the haplotypes found in type 1 diabetes patients, all DRB1*04:05 carriers had the DQA1*03:03 allele, whereas the DRB1*04:01 carriers were found to have either the DQA1*03:03 (14.3%) or the DQA1*03:01 allele (85.7%; Table 2). Here, HLA-DRB1 is linked to type 1 diabetes mellitus.