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Abstract
Mesh: See more » AdolescentAfrican AmericansAge FactorsCough/epidemiologyCough/etiologyEducational StatusEthnic GroupsEuropean Continental Ancestry GroupFemaleHumansMaleNew YorkParentsPneumonia/complicationsRespiratory Tract Diseases/epidemiologyRespiratory Tract Diseases/etiologySchoolsSex FactorsSmoking/complicationsSmoking/epidemiologySocial ClassStudents
Year: 1974 PMID: 4854133 DOI: 10.1093/ije/3.2.153
Source DB: PubMed Journal: Int J Epidemiol ISSN: 0300-5771 Impact factor: 7.196