title: Intrathoracic pressure development in chronic airways obstruction.
mesh_terms: D000368:Aged; D002908:Chronic Disease; D004947:Esophagus; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000503:physiopathology*; D008297:Male; D008875:Middle Aged; D011312:Pressure; D012119:Respiration; D013147:Spirometry