HLA-DRB1 and type 1 diabetes mellitus: We previously demonstrated that HLA-DRB1*04:05-DQB1*04:01, -DRB1*08:02-DQB1*03:02, -DRB1*09:01-DQB1*03:03, and -DRB1*13:02-DQB1*06:04 haplotypes confer susceptibility to classical T1D, and HLA-DRB1*08:02-DQB1*03:02 and -DRB1*09:01-DQB1*03:03 haplotypes confer susceptibility to slow-onset T1D in the Japanese population [2].