Cite
HARVARD Citation
Puffer, S. et al. (2003). Evidence for risk of bias in cluster randomised trials: review of recent trials published in three general medical journals. BMJ. 327 (7418), pp. 785-789. [Online].
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Puffer, S. et al. (2003). Evidence for risk of bias in cluster randomised trials: review of recent trials published in three general medical journals. BMJ. 327 (7418), pp. 785-789. [Online].