title: [Relationship between maximal expiratory flow response to low density gas breathing and conventional parameters to determine the site of airway obstruction in asthmatics].
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000402:Airway Obstruction / Q000175:diagnosis*; D001249:Asthma / Q000150:complications*; D005260:Female; D005540:Forced Expiratory Flow Rates; D006801:Humans; D008297:Male; D008449:Maximal Expiratory Flow-Volume Curves; D008875:Middle Aged