HLA-DRB1 and Alzheimer disease: HLA-DRB1 variant rs6931277 associated with AD was also associated with diseases with an immune-related etiology such as ulcerative colitis (UC, p = 2.23 x10-10), self-reported rheumatoid arthritis (RA, p = 2.30 x 10−130), celiac disease (CeD, p = 5.99 x10-54), self-reported asthma (p = 8.57 x 10−68), self-reported multiple sclerosis (p = 1.22 x 10−13), Type 1 diabetes (p = 1.55 x10-60) in the UKB cohort.