1. NHLBI/WHO Workshop. Global Strategy for the Diagnosis, Management and Prevention of Chronic Obstructive Pulmonary Disease, Global Initiative for Chronic Obstructive Lung Disease. National Heart, Lung and Blood Institute, Bethesda 2001; 1–100, (updated 2003)
2. Adverse effects of β-agonists
3. Efficacy and Safety of Inhaled Corticosteroids