title: Double-blind crossover trial of bisolvon in the treatment of chronic bronchitis.
mesh_terms: D001964:Bromhexine / Q000627:therapeutic use*; D001991:Bronchitis / Q000188:drug therapy*; D002908:Chronic Disease; D002986:Clinical Trials as Topic; D006801:Humans
chemical_list: D001964:Bromhexine