HLA-DRB1 and autoimmune hepatitis: Our data support the finding that the DRB1*15:01 allele and/or DRB1*15:01-DQB1*06:02 haplotype has a significantly reduced incidence and apparently protective role in Caucasian patients with AIH.[7], [30]_ENREF_26 This is a newly established consensus on this haplotype conferring AIH resistance.