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. 1997 Sep 6;315(7108):600. doi: 10.1136/bmj.315.7108.600
Statistics notes. Trials randomised in clusters.
J M Bland
1, S M Kerry
1
J M Bland
1Department of Public Health Sciences, St George's Hospital Medical School, London.
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S M Kerry
1Department of Public Health Sciences, St George's Hospital Medical School, London.
Find articles by S M Kerry
1Department of Public Health Sciences, St George's Hospital Medical School, London.
PMCID: PMC2127388 PMID: 9302962