Fig. 4From: Prognostic significance of K-ras mutations in pancreatic cancer: a meta-analysisBegg’s funnel plots of the prognostic role of K-ras gene mutations in pancreatic cancer patients. Each point represents a separate study for the indicated association. Log(HR) natural logarithm of HR; horizontal line means the magnitude of the effect. Note: A funnel plot with ~95 % confidence limit was used (Egger’s test: t = −0.95, P = 0.356)Back to article page