Tobacco smoking in fifty-year-old men. I. Respiratory symptoms and ventilatory function tests.
D000397:Air Pollution; D003371:Cough; D004417:Dyspnea; D006801:Humans; D008297:Male; D008875:Middle Aged; D010947:Plants, Toxic; D012129:Respiratory Function Tests; D012907:Smoking; D013183:Sputum; D014026:Nicotiana