Polymorphisms in intron 1 of HLA-DRA differentially associate with type 1 diabetes and celiac disease and implicate involvement of complement system genes C4A and C4B. - Aydemir O; Bailey JA; Agardh D; Lernmark Å; Noble JA; Andersson Svärd A; Blankenhorn EP; Parikh HM; Ziegler AG; Toppari J; Akolkar B; Hagopian WA; et al. (ELife, 2026)