Fig. 7

Publication bias. a, d: The correlation of nestin expression with OS in univariate analysis (a Begg’s test; d Egger’s test); b, e The correlation of nestin expression with HER2 status (b Begg’s test; e Egger’s test); c, f: The correlation of nestin expression with CK5 status (c Begg’s test; f Egger’s test)