This study searched CNKI，Wanfang Data，CBM，VIP，PubMed，Embase，Web of Science and Cochrane Library for studies evaluating risk factors of BPD from inception to October 2021 to systematically analyze the risk factors for BPD in preterm infants.
Yu, Zhumei; Liu, Annuo; Xiao, Juan; and Tang, Yuxia
"Risk Factors for Bronchopulmonary Dysplasia in Premature Infants：a Meta-analysis,"
General Practice in China: Vol. 1:
4, Article 8.
Available at: https://www.gpinchina.net/journal/vol1/iss4/8