Figure 2From: PCA-based bootstrap confidence interval tests for gene-disease association involving multiple SNPsLD ( r2) among nine OPRM1 SNPs. The nine OPRM1 SNPs are rs1799971, rs510769, rs696522, rs1381376, rs3778151, rs2075572, rs533586, rs550014, rs658156. The triangles mark the LD block 1 (rs696522, rs1381376, rs3778151) and LD block 2 (rs550014, rs658156).Back to article page