[Correspondence] Gastrointestinal cancer risk in cystic fibrosis: more exploration is needed – Authors' reply

We read with interest the letter by Li Yao and Wenquan Niu1 regarding our meta-analysis. We agree that, when a small number of studies is included in a meta-analysis, the robustness of the outcome should be interpreted with caution2 and the assessment of bias by funnel plots might not be useful.3

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