Epidemiological investigations on environmental tobacco smoke.
D000223:Adaptation, Psychological; D000293:Adolescent; D000328:Adult; D004781:Environmental Exposure; D004782:Environmental Health; D006801:Humans; D006967:Hypersensitivity; D007223:Infant; D012140:Respiratory Tract Diseases / Q000453:epidemiology / Q000209:etiology; D012907:Smoking