Confounding, causality, and confusion: the role of intermediate variables in interpreting observational studies in obstetrics
American journal of obstetrics and gynecology, 2017-08, Vol.217 (2), p.167 [Peer Reviewed Journal]Copyright © 2017 Elsevier Inc. All rights reserved. ;EISSN: 1097-6868 ;DOI: 10.1016/j.ajog.2017.04.016 ;PMID: 28427805
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