title: Effects of aging on airway hyperreactivity in normal persons.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D000375:Aging; D000403:Airway Resistance; D001249:Asthma / Q000503:physiopathology; D001980:Bronchi / Q000502:physiology*; D001985:Bronchial Provocation Tests / Q000379:methods*; D002648:Child; D005260:Female; D006801:Humans; D008168:Lung / Q000502:physiology*; D008297:Male; D016210:Methacholine Chloride; D008688:Methacholine Compounds; D008875:Middle Aged
chemical_list: D008688:Methacholine Compounds; D016210:Methacholine Chloride