Beta-2 agonists and asthma morbidity.
D000318:Adrenergic beta-Agonists / Q000008:administration & dosage / Q000627:therapeutic use*; D001249:Asthma / Q000188:drug therapy*; D006801:Humans; D009330:Nebulizers and Vaporizers
D000318:Adrenergic beta-Agonists