Research Article

Polymorphisms in Vitamin D Receptor Genes in Association with Childhood Autism Spectrum Disorder

Figure 1

Linkage disequilibrium plot of the four examined SNPs in the VDR gene. The coefficient (D′) of the linkage disequilibrium was displayed as the number in the squares at the upper diagrams. The regression coefficient (r2) of the linkage disequilibrium was displayed at the bottom. The square in red indicates high linkage disequilibrium.