| Andrew J Kotaska Epidural analgesia associated with low-dose oxytocin augmentation increases cesarean births: a critical look at the external validity of randomized trialsAndrew J Kotaska Department of Obstetrics and Gynaecology, University of British Columbia, Vancouver, British Columbia, Canada Am J Obstet Gynecol 194:809-14. 2006 Inappropriate use of randomised trials to evaluate complex phenomena: case study of vaginal breech deliveryAndrew Kotaska Department of Obstetrics and Gynaecology, University of British Columbia, BC Women's Hospital, Vancouver, BC, V6H 3V5 Canada BMJ 329:1039-42. 2004
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