Fig. 4From: Association between gut microbiota and longevity: a genetic correlation and mendelian randomization study Scatter plots of the association of Collinsella and parental longevity. Each black point represents an SNP, plotted by the estimate of SNP on Collinsella (x-axis) and the estimate of SNP on parental longevity (father’s age at death) (y-axis). The slopes of each line represent the potential causal associations for each methodBack to article page