Funnel plots assessing possible publication bias for clinicopathological features (A: lymph node involvement; B: clinical stage; C: cell differentiation; D: depth of invasion; E: gender; F: age).

Abstract

<p>Funnel plots assessing possible publication bias for clinicopathological features (A: lymph node involvement; B: clinical stage; C: cell differentiation; D: depth of invasion; E: gender; F: age).</p