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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., Wald K., Smith D. The extent of Down's syndrome screening in Britain in 1991. Lancet. 1992 Aug 22;340(8817):494–494. doi: 10.1016/0140-6736(92)91822-p. [DOI] [PubMed] [Google Scholar]
