The ADC4 sample set was genotyped by the Center for Applied Genomics at the Children’s Hospital of Philadelphia using the Illumina Human OmniExpress (HumanOmniExpress-12v1_H) BeadChip which captures genotype data on 730,525 genomic SNPs. The standard Alzheimer’s Disease Genetics Consortium (ADGC) quality control pipeline (Naj et al. 2011) was applied to this GWAS dataset.