panels: (1) all 1,094 individuals; (2) 120 randomly selected individuals; (3) 246 individuals with African ancestry; (4) 286 individuals with Asian ancestry; (5) 381 individuals with European ancestry; and (6) 181 individuals from the Americas (comprised of Colombian, Mexican, and Puerto Rican samples). A seventh reference panel consisting of 119 individuals from the GAW18 sample who were not included in the imputation study sample was also evaluated. Genotype imputation accuracy for the seven reference panels was assessed by comparing the concordance between imputed genotypes and genotypes from the WGS data.
