Changing concepts of the asthma problem.
D000328:Adult; D000397:Air Pollution; D001249:Asthma / Q000188:drug therapy / Q000209:etiology / Q000401:mortality; D001993:Bronchodilator Agents / Q000009:adverse effects; D003191:Comprehensive Health Care; D004502:Education, Medical, Continuing; D005260:Female; D006801:Humans
D001993:Bronchodilator Agents