Topics: Airway inflammation, Airway hyperresponsiveness, Sympathomimetic Agents, Epinephrine, Beta2-adrenergic agonists, Skeletal muscle tremor, Tachycardia, Arterial oxygen tension, Methylxanthines, Theophylline, Muscarinic Receptor Antagonists, ipratropium bromide, Adrenal corticosteroids, Cromolyn sodium, Leukotreine inhibitors, Zafirlukast, Montelukast sodium, Zileuton, Omalizumab, Monoclonal antibodies