Fig. 1From: Association of APP gene polymorphisms and promoter methylation with essential hypertension in Guizhou: a case–control studyAPP gene linkage disequilibrium analysis (D′). D′ = 0 meant complete linkage equilibrium, D′ = 1 meant complete linkage disequilibrium, and > 0.8 meant strong linkage disequilibriumBack to article page