HLA-DRB1 and triple-A syndrome: In this analysis, carriers of HLA-DRB1*01 and *07 were shown to be less prevalent in AAA+ than AAA- subjects (OR = 0.236, P = 0.014, 95% CI: [0.046, 0.770] and OR = 0.253, P = 0.021, 95% CI: [0.050, 0.826]).