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Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Whitfield C. R., Chan W. H., Sproule W. B., Stewart A. D. Amniotic fluid lecithin: sphingomyelin ratio and fetal lung development. Br Med J. 1972 Apr 8;2(5805):85–86. doi: 10.1136/bmj.2.5805.85. [DOI] [PMC free article] [PubMed] [Google Scholar]
