title: Nitrogen and 133xenon closing volumes in healthy non-smokers.
mesh_terms: D000328:Adult; D000403:Airway Resistance; D005260:Female; D005652:Functional Residual Capacity; D006801:Humans; D008168:Lung / Q000502:physiology*; D008176:Lung Volume Measurements / Q000379:methods*; D008297:Male; D008875:Middle Aged; D009590:Nitrogen Radioisotopes; D011650:Pulmonary Alveoli / Q000502:physiology; D013147:Spirometry; D014980:Xenon Radioisotopes
chemical_list: D009590:Nitrogen Radioisotopes; D014980:Xenon Radioisotopes