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. 2021 Jan 5;8:605879. doi: 10.3389/fped.2020.605879

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Copyright © 2021 Liu, Zhu, Li and Shi.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Results of complications in primary analysis. (A) Forest plot of association between PDA and bronchopulmonary dysplasia; (B) funnel plot for publication bias of the association between PDA and bronchopulmonary dysplasia; (C) forest plot of association between PDA and intraventricular hemorrhage; (D) funnel plot for publication bias of the association between PDA and intraventricular hemorrhage; (E) forest plot of association between PDA and necrotizing enterocolitis; (F) funnel plot for publication bias of the association between PDA and necrotizing enterocolitis. PDA, patent ductus arteriosus.