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. 2020 Sep 20;11(11):3260–3268. doi: 10.1111/1759-7714.13664

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© 2020 The Authors. Thoracic Cancer published by China Lung Oncology Group and John Wiley & Sons Australia, Ltd.

This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc-nd/4.0/ License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made.

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Results of Deeks's funnel plot of asymmetry test for publication bias. The nonsignificant slope indicates that no significant bias was found. ESS; effective sample size () Study and () Regression Line.

Inline graphic — Results of Deeks's funnel plot of asymmetry test for publication bias. The nonsignificant slope indicates that no significant bias was found. ESS; effective sample size () Study and () Regression Line.