HLA-DRB1 and autoimmune hepatitis: Logistic regression analysis revealed that the HLA-DRB1*04:05 allele (P < 0.001, OR = 4.61, 95% CI = 2.86–7.41) and rs9277534 (P = 0.004, OR = 1.67, 95% CI = 1.18–2.37) were independently associated with AIH susceptibility.