CoughQiRespiration DisordersWhooping CoughRespiratory Tract DiseasesAntitussive AgentsRespiratory SoundsBronchitisBronchitis, ChronicMucusDustMedicine, Chinese TraditionalRespiratory Function TestsSputumAsthmaDrugs, Chinese HerbalSmokingTextile IndustryChronic DiseaseOccupational ExposureSulfur DioxideForced Expiratory VolumeOccupational DiseasesLung DiseasesDyspneaVital CapacityAir PollutionPrevalenceTobacco Smoke PollutionAir Pollution, IndoorAir Pollutants, OccupationalSpirometryCross-Sectional StudiesCapsaicinCitric AcidEnvironmental ExposureCodeineLungQuestionnairesPulmonary Disease, Chronic ObstructiveReflexExpectorantsChinaItalyScotlandBordetella pertussisRisk FactorsHealth SurveysNasal Decongestants