title: Asthma drug therapy trends in the United States, 1972 to 1985.
mesh_terms: D001249:Asthma / Q000188:drug therapy*; D001993:Bronchodilator Agents / Q000627:therapeutic use*; D011307:Drug Prescriptions; D006801:Humans; D014481:United States
chemical_list: D001993:Bronchodilator Agents