Widespread non-additive and interaction effects within HLA loci modulate the risk of autoimmune diseases. - Lenz TL; Deutsch AJ; Han B; Hu X; Okada Y; Eyre S; Knapp M; Zhernakova A; Huizinga TW; Abecasis G; Becker J; Boeckxstaens GE; et al. (Nature genetics, 2015)