title: Epidemiologic studies of chronic respiratory diseases in some regions of China.
authors.forename: B Y
authors.initials: BY
authors.lastname: Yan
mesh_terms: D000397:Air Pollution / Q000009:adverse effects; D002681:China; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000453:epidemiology*; D008297:Male; D009784:Occupational Diseases / Q000453:epidemiology; D012307:Risk Factors