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Blinding and exclusions after allocation in randomised controlled trials: survey of published parallel group trials in obstetrics and gynaecology. |
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| Authors: | K. F. Schulz D. A. Grimes D. G. Altman R. J. Hayes |
| Affiliation: | Division of Sexually Transmitted Diseases Prevention, Centers for Disease Control and Prevention, Atlanta, GA 30333, USA. |
| Abstract: | |
| Keywords: | |