Genotyping for the replication sets was completed using the iPLEXtm Sequenom MassArray® platform. Included in each 96-well plate as QC samples were two negative controls (water), two blinded duplicates, and two samples included in the HapMap project. The mean concordance rate was 99.7% for blind duplicates (2,572 comparisons) and 99.2% for HapMap samples (1,751 comparisons).
