Copyright information:Taken from "Strategy and model building in the fourth dimension: a null model for genotype × age interaction as a Gaussian stationary stochastic process"http://www.biomedcentral.com/1471-2156/4/s1/S34BMC Genetics 2003;4(Suppl 1):S34-S34.Published online 31 Dec 2003PMCID:PMC1866541. Right panel, Univariate analysis for corrected SBP residuals for Cohort 2, Exam 4 (dot-dash) and bivariate analyses for corrected SBP residuals for Exams 3 and 4 (long dash) and 4 and 5 (solid line).