title: Role of biologic markers in epidemiologic studies of prenatal drug exposure: issues in study design.
authors.affiliation: Department of Epidemiology and Public Health, Yale University Medical School, New Haven, CT 06510.
authors.forename: M B
authors.initials: MB
authors.lastname: Bracken
authors.forename: B
authors.initials: B
authors.lastname: Leaderer
authors.forename: K
authors.initials: K
authors.lastname: Belanger
mesh_terms: D015415:Biomarkers; D005260:Female; D006801:Humans; D011247:Pregnancy; D011248:Pregnancy Complications / Q000175:diagnosis / Q000453:epidemiology*; D012107:Research Design; D019966:Substance-Related Disorders / Q000175:diagnosis / Q000453:epidemiology*
chemical_list: D015415:Biomarkers