Figure 3 displays r2 values in our case-control sample in European-Americans and African-Americans, respectively. The SNPs are all those genotyped in our sample that have r2 ≥ 0.8 with rs16969968 in HapMap CEU. Figure 3 defines the set of SNPs for which we will carry out our cross-population approach, and indicates that there are indeed contrasts in the LD patterns in our EA and AA samples to enable this approach.
