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. 1996 Sep 7;313(7057):629. doi: 10.1136/bmj.313.7057.629

Combining qualitative studies with randomised controlled trials is often useful.

T Weaver, A Renton, P Tyrer, J Ritchie

PMCID: PMC2352016 PMID: 8806277

629

Selected References

These references are in PubMed. This may not be the complete list of references from this article.

Black N. Why we need observational studies to evaluate the effectiveness of health care. BMJ. 1996 May 11;312(7040):1215–1218. doi: 10.1136/bmj.312.7040.1215. [DOI] [PMC free article] [PubMed] [Google Scholar]

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