Fig. 4From: An efficient genome-wide association test for multivariate phenotypes based on the Fisher combination functionThe QQ-plot of p-values for the Fisher combination test of association between the SNPs and the multivariate phenotype of addiction. The x-axis is the expected −log10(p-value), and the y-axis is the observed −log10(p-value). The diagonal gray straight lines have the slope 1 and intercept 0Back to article page