title: Chicken or egg? Risks of misattribution of cause-effect relationships in studies of association.
authors: Division of Emergency Medicine, Duke University Medical Center, Durham, NC.
authors: Alex
authors: A
authors: Limkakeng
authors: Joshua Seth
authors: JS
authors: Broder
authors: Brent Jason
authors: BJ
authors: Theiling
mesh_terms: D002983:Clinical Competence; D004636:Emergency Service, Hospital; D005260:Female; D006801:Humans; D007442:Intubation, Intratracheal / Q000009:adverse effects* / Q000379:methods*; D008297:Male