title: [Descent gradient of maximal expiratory flow-volume curve and uneven distribution of ventilation].
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D005540:Forced Expiratory Flow Rates; D006801:Humans; D008171:Lung Diseases / Q000000981:diagnostic imaging / Q000503:physiopathology*; D008297:Male; D008449:Maximal Expiratory Flow-Volume Curves; D008875:Middle Aged; D011659:Pulmonary Gas Exchange; D011877:Radionuclide Imaging; D013667:Technetium; D014980:Xenon Radioisotopes
chemical_list: D014980:Xenon Radioisotopes; D013667:Technetium