The relative value of evidence.
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Department of Obstetrics and Gynaecology, Family Medicine and Community Health Sciences, University of Calgary, Calgary AB.
D035843:Biomedical Research / Q000592:standards*; D019317:Evidence-Based Medicine / Q000592:standards*; D005260:Female; D006801:Humans; D007226:Infant Mortality; D007231:Infant, Newborn; D008297:Male; D008428:Maternal Mortality; D011247:Pregnancy