Additive and interaction effects at three amino acid positions in HLA-DQ and HLA-DR molecules drive type 1 diabetes risk. - Hu X; Deutsch AJ; Lenz TL; Onengut-Gumuscu S; Han B; Chen WM; Howson JM; Todd JA; de Bakker PI; Rich SS; Raychaudhuri S (Nature genetics, 2015)