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Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Lawson D. H. The yellow card: mark II. BMJ. 1990 Dec 1;301(6763):1234–1234. doi: 10.1136/bmj.301.6763.1234. [DOI] [PMC free article] [PubMed] [Google Scholar]