HLA-C and systemic lupus erythematosus: After imputation of SLE GWAS data for Chinese Han subjects (1,659 cases versus 3,398 controls) we obtained genotypes for 10 HLA two‐digit alleles, 13 HLA four‐digit alleles, 173 HLA amino acid positions and 231 SNPs encoded by HLA genes of the class I and class II (p < 1.67 × 10−6) from the genotyped MHC SNPs (29–34 Mb at chromosome 6).