After imputation of HLA and MICA, we obtained genotypes for 7,078 SNPs in the MHC region (29.6–33.2 Mb at chromosome 6, UCSC Genome Browser hg18), 105 two-digit HLA or MICA alleles, 176 four-digit HLA or MICA alleles, and 438 amino acid polymorphisms encoded by HLA or MICA genes. Imputation of MICA demonstrated high concordance between genotyped and imputed genotypes (88.9% for both two- and four-digit alleles), which was comparable to that reported for imputation of other HLA genes.24–26