HLA-DRB1 and Huntington disease: Our results demonstrated that the HLA-A*68, HLA-B*51, and HLA-DRB1*15 alleles were significantly more frequent in HD patients in comparison to controls (P = 0.026; OR = 6.188, P = 0.00008; OR = 2.86, P = 0.00006; OR = 5.315, resp).