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Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Wald N. J., Kennard A., Densem J. W., Cuckle H. S., Chard T., Butler L. Antenatal maternal serum screening for Down's syndrome: results of a demonstration project. BMJ. 1992 Aug 15;305(6850):391–394. doi: 10.1136/bmj.305.6850.391. [DOI] [PMC free article] [PubMed] [Google Scholar]
