Box plots per MAF showing the heterozygous genotype imputation sensitivity before (raw) and after GDI filters. Data are derived from 138 nonpregnant healthy individuals sequenced at 0.1–0.2× coverage and genotyped, in parallel, on Illumina Infinium Global Screening Array-24 v3.0 for ∼700,000 SNPs. The array-based genotype calls were considered as truth.