title: Studying interpregnancy interval effects using observational data: some cautionary remarks.
authors.affiliation: Department of Epidemiology, University of Pittsburgh, Pittsburgh, PA, USA.
authors.forename: A I
authors.initials: AI
authors.lastname: Naimi
mesh_terms: D001721:Birth Intervals; D015331:Cohort Studies; D005260:Female; D006801:Humans; D030361:Papillomavirus Infections; D002583:Uterine Cervical Neoplasms