Randomised Trials in Peri-Natal Medicine: Suggestions to Overcome Practical Limitations and Ethical Constraints
Lilford, Richard J.
Journal of Perinatal Medicine. 1989; 17(1): 13-18.
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Edwards, Sarah J.L.; Braunholtz, David A.; Lilford, Richard J.; Stevens, Andrew J. (1999-05-22)In most randomised controlled trials, individual patients are randomised to a treatment or control group, but sometimes this is undesirable or even impossible and groups (clusters) of people may be randomised instead. These ...