W Haenszel, A Hougen. Show Affiliations »
Abstract
Mesh: See more » AdultAge FactorsAgedBronchitis/epidemiologyCough/epidemiologyEmigration and ImmigrationFemaleHumansMaleMiddle AgedMucus/metabolismNorwayOccupationsRespiratory Tract Diseases/epidemiologyRespiratory Tract Diseases/mortalityRural PopulationSampling StudiesSex FactorsSmoking/complicationsSmoking/epidemiologySocial ClassSurveys and QuestionnairesUnited StatesUrban Population
Year: 1972 PMID: 4647215 DOI: 10.1016/0021-9681(72)90151-8
Source DB: PubMed Journal: J Chronic Dis ISSN: 0021-9681