Genotyping was performed by the Center for Inherited Disease Research (CIDR) at John Hopkins University using the Illumina Infinium II assay protocol protocol [Gunderson et al., 2006] for hybridization to Illumina HumanHap 1M BeadChips (Illumina, San Diego, CA). Details are reported by Edenberg et al. [2010] and both protocols and the dataset are available on the NCBI database dbGaP (available at http://www.ncbi.nlm.nih.gov/sites/entrez?db=gap; accession number: phs000125.v1.p1). Blind duplicate reproducibility was 99.97%.
