title: Methodological issues in studying cocaine use in pregnancy: a problem of definitions.
authors.affiliation: Northwestern University Medical School, Chicago, IL.
authors.forename: I J
authors.initials: IJ
authors.lastname: Chasnoff
mesh_terms: D003042:Cocaine / Q000009:adverse effects*; D005260:Female; D005333:Fetus / Q000187:drug effects*; D006801:Humans; D011247:Pregnancy; D011248:Pregnancy Complications; D012306:Risk; D019966:Substance-Related Disorders; D014116:Toxicology / Q000379:methods
chemical_list: D003042:Cocaine