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. 1998 Jan 17;316(7126):201. doi: 10.1136/bmj.316.7126.201
Understanding controlled trials. Why are randomised controlled trials important?
B Sibbald
1, M Roland
1
B Sibbald
1National Primary Care Research and Development Centre, University of Manchester.
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M Roland
1National Primary Care Research and Development Centre, University of Manchester.
Find articles by M Roland
1National Primary Care Research and Development Centre, University of Manchester.
PMCID: PMC2665449 PMID: 9468688