AKAP9 and early-onset autosomal dominant Alzheimer disease: Our study leveraged phenotypic data previously assembled by the Alzheimer Disease Genetics Consortium for large-scale genetic studies in AAs (Reitz, et al. 2013) and genotypes for two AA-specific AKAP9 mutations (I2558M and S3771 L) in the ADGC cohort (Logue et al. 2014).