title: Paternal age and birth defects: how strong is the association.
authors.forename: Elizabeth
authors.initials: E
authors.lastname: Crane
authors.forename: Joan K
authors.initials: JK
authors.lastname: Morris
mesh_terms: D015986:Confounding Factors, Epidemiologic; D000013:Congenital Abnormalities / Q000453:epidemiology / Q000209:etiology*; D005260:Female; D006801:Humans; D008297:Male; D008423:Maternal Age; D010331:Paternal Age