title: Abortion and substance use: cause or confounding?
authors.forename: Preben
authors.initials: P
authors.lastname: Aavitsland
mesh_terms: D000028:Abortion, Induced / Q000523:psychology*; D000293:Adolescent; D000328:Adult; D005260:Female; D006801:Humans; D011247:Pregnancy; D012044:Regression Analysis; D019966:Substance-Related Disorders / Q000523:psychology*