OR plot for significant HLA allelic associations. Protective alleles are indicated in blue and predisposing alleles in red for the (A) white population and the (B) African-American population. Alleles are organized in genomic order scanning across HLA loci in the MHC region of chromosome 6. ORs are indicated by a black dot, with a 95% FDR-adjusted confidence interval. P values are indicated above the 95% confidence interval for each allele. Allele frequencies in cases and controls are provided.