The vital capacity difference.
D001991:Bronchitis / Q000502:physiology*; D004646:Emphysema; D008168:Lung; D011656:Pulmonary Emphysema / Q000502:physiology*; D012129:Respiratory Function Tests; D013990:Tidal Volume
BRONCHITIS/physiology; EMPHYSEMA, PULMONARY/physiology; RESPIRATION/function tests