Full text
PDFSelected References
These references are in PubMed. This may not be the complete list of references from this article.
- Bland J. M., Altman D. G. Matching. BMJ. 1994 Oct 29;309(6962):1128–1128. doi: 10.1136/bmj.309.6962.1128. [DOI] [PMC free article] [PubMed] [Google Scholar]