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Assessment of environmental tobacco smoke exposure in children with asthmatic symptoms by questionnaire and cotinine concentrations in plasma, saliva, and urine

AsthmaTobacco ControlTobacco UseRespiratory ToxicologyEnvironmental HealthInhalation ToxicologyAir QualityPediatricsAsthmatic SymptomsToxicologyAir PollutionPublic HealthMedicineCotinine Concentrations