Bronchial hyperreactivity in chronic obstructive bronchitis.
D001986:Bronchial Spasm / Q000139:chemically induced; D001991:Bronchitis / Q000139:chemically induced*; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000139:chemically induced*; D016210:Methacholine Chloride; D008688:Methacholine Compounds / Q000009:adverse effects*
D008688:Methacholine Compounds; D016210:Methacholine Chloride