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BMJ. 1999 May 22;318(7195):1407-9.

Ethical issues in the design and conduct of cluster randomised controlled trials.

Author information

  • 1Department of Public Health Medicine, University of Birmingham, Birmingham B15 2TT. S.J.Edwards@bham.ac.uk
PMID:
10334756
[PubMed - indexed for MEDLINE]
PMCID:
PMC1115783
Free PMC Article
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