Figure 3. Linkage disequilibrium structure of serpin peptidase inhibitor, clade G, member 1 (SERPING1). Linkage disequilibrium (LD) was measured using data from all subjects in this study. The haplotype blocks were determined using the “4-gamete rule” option implemented in the Haploview software. Each box provides estimated statistics of the coefficient of determination (r²), with darker shades representing stronger LD.