title: Clinical significance of pulmonary function tests: upper airway obstruction.
mesh_terms: D000402:Airway Obstruction / Q000175:diagnosis* / Q000503:physiopathology; D000403:Airway Resistance; D001274:Atmospheric Pressure; D005541:Forced Expiratory Volume; D006801:Humans; D012119:Respiration; D012129:Respiratory Function Tests; D013147:Spirometry; D014797:Vital Capacity