Closing volume and the single breath nitrogen index in a Danish population - a ten year follow-up.
D003718:Denmark; D005500:Follow-Up Studies; D005541:Forced Expiratory Volume; D006801:Humans; D008176:Lung Volume Measurements; D008297:Male; D008875:Middle Aged; D009765:Obesity / Q000401:mortality; D012140:Respiratory Tract Diseases / Q000401:mortality*; D012907:Smoking; D014797:Vital Capacity