Skinningsrud B et al. - Polymorphisms in CLEC16A and CIITA remained significantly associated with Addison's disease in the Norwegian sample set at the 0.05 level, even after correction for multiple testing. CLEC16A and CIITA are both located at 16p13, but linkage disequilibrium patterns and logistic regression analyses suggest that SNPs in these two genes are independently associated with Addison's disease.