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Relative extended haplotype homozygosity (REHH) calculated with Sweep software (http://www.broad.mit.edu/mpg/sweep/index.html) for EA and AA samples. REHH measures the comparative decay of homozygosity for one haplotype among haplotypes of a given core. The 15-SNP haplotypes compared have, for a core region of SNPs 2–5, either derived or ancestral alleles for the core SNPs.
