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. 1998 Jan 3;316(7124):54. doi: 10.1136/bmj.316.7124.54
Analysis of a trial randomised in clusters.
S M Kerry
1, J M Bland
1
S M Kerry
1Division of General Practice and Primary Care, St George's Hospital Medical School, London.
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J M Bland
1Division of General Practice and Primary Care, St George's Hospital Medical School, London.
Find articles by J M Bland
1Division of General Practice and Primary Care, St George's Hospital Medical School, London.
PMCID: PMC2665333 PMID: 9451271