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The relationship between systolic acceleration time or ejection time ratio of full-term fetal main pulmonary artery ultrasound and neonatal lung maturity: A case-control study
SHANG Zhenmiao, LI Jianling, SHI Taiying, CUI Lidan
Chinese Journal of Evidence-Based Pediatrics . 2022, (3): 210 -214 .  DOI: 10.3969/j.issn.1673-5501.2022.03.007