HLA-DRB1 and type 1 diabetes mellitus: Susceptible haplotypes, including DRB1*0301-DQA1*0501-DQB1*0201 (DR3), DRB1*0405-DQA1*0303-DQB1*0401 (DR4), and DRB1*0901-DQA1*0302-DQB1*0303 (DR9), were found to be the common high-risk susceptible HLA haplotypes in T1D and LADA (15).