Flow volume loops.
D005540:Forced Expiratory Flow Rates; D005541:Forced Expiratory Volume; D006371:Helium; D006801:Humans; D008168:Lung / Q000503:physiopathology; D008449:Maximal Expiratory Flow-Volume Curves; D010100:Oxygen; D014797:Vital Capacity
D006371:Helium; D010100:Oxygen