title: [Analysis of respiratory tract symptoms and bronchitis caused by smoking].
mesh_terms: D000328:Adult; D001991:Bronchitis / Q000209:etiology*; D006801:Humans; D008297:Male; D012140:Respiratory Tract Diseases / Q000209:etiology*; D013997:Time Factors; D014029:Tobacco Use Disorder / Q000150:complications*