Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Results of neonatal characteristics in primary analysis. (A) Forest plot of association between PDA and gestational age; (B) funnel plot for publication bias of the association between PDA and gestational age; (C) forest plot of association between PDA and birth weight; (D) funnel plot for publication bias of the association between PDA and birth weight. PDA, patent ductus arteriosus.
