title: Comparative sensitivity of four methods for measuring changes in respiratory flow resistance in man.
mesh_terms: D000403:Airway Resistance / Q000295:instrumentation*; D004947:Esophagus; D005069:Evaluation Studies as Topic; D006801:Humans; D008722:Methods; D010991:Plethysmography; D012123:Pulmonary Ventilation / Q000295:instrumentation*; D013458:Sulfur Dioxide / Q000494:pharmacology
chemical_list: D013458:Sulfur Dioxide