Fig. 1: Smoking and lung cancer.
From: The Burden of Proof studies: assessing the evidence of risk
a, Log relative risk function for smoking and lung cancer. b, Relative risk function for smoking and lung cancer. c, A modified funnel plot for smoking and lung cancer showing the residuals (relative to 0) on the x axis and the estimated standard deviation (s.d.) that includes reported s.d. and between-study heterogeneity on the y axis.
