2Campbell SC.Clinical aspects of inhaled anticholinergic therapy[J].Respir Care,2000,45(7):864-867.
3Campbell SC. Clinical aspects of inhaled anticholinergic therapy.Respir Care 2000,45(7) :864-7.
4Ronald D,Dariusz N,et al. Inhaled Formo Terol Dry Powder Versus Ipratropium Bromide in Chronic Obstructive Pulmonary Disease. Am J. Respir. Crit. Care Med,164(5) :2001,778- 784.
5Anthony D, Maria CDS, Alicia RR, et al. In Patients with COPD.Treatment With a combination of formoterol and Ipratropium Is More Effective Than a combination of salbutamol and ipratropium.Chest 2001,119:1347- 1356.
