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Title
Evidence for risk of bias in cluster randomised trials: review of recent trials published in three general medical journals.
Authors
Puffer, Suezann; Torgerson, David; Watson, Judith
Abstract
To examine the prevalence of a risk of bias associated with the design and conduct of cluster randomised controlled trials among a sample of recently published studies.
Publication
BMJ (Clinical research ed.), 2003, Vol 327, Issue 7418, p785