title: Child psychiatric disorder and relative age in school year: Peer effects need to be considered.
authors.forename: Woody
authors.initials: W
authors.lastname: Caan
mesh_terms: D000367:Age Factors; D000374:Aggression; D002648:Child; D006801:Humans; D001523:Mental Disorders / Q000209:etiology*; D010379:Peer Group; D013663:Teaching