title: Airway responsiveness in infancy.
mesh_terms: D000318:Adrenergic beta-Agonists / Q000627:therapeutic use; D006801:Humans; D007223:Infant; D009130:Muscle, Smooth / Q000187:drug effects / Q000503:physiopathology*; D010276:Parasympatholytics / Q000627:therapeutic use; D012135:Respiratory Sounds / Q000503:physiopathology*
chemical_list: D000318:Adrenergic beta-Agonists; D010276:Parasympatholytics