Cigarette smoking and changes in respiratory findings.
D000328:Adult; D000368:Aged; D003371:Cough; D006801:Humans; D008297:Male; D008875:Middle Aged; D010608:Pharyngeal Diseases / Q000209:etiology; D010947:Plants, Toxic; D012137:Respiratory System / Q000503:physiopathology*; D012140:Respiratory Tract Diseases; D012220:Rhinitis / Q000209:etiology; D012907:Smoking / Q000150:complications / Q000503:physiopathology*; D013183:Sputum / Q000032:analysis; D013997:Time Factors; D014026:Nicotiana