7Global strategy for the diagnosis and prevention of COPD.http://www.goldcopd.org.
8Adams SG,Anzueto A,Briggs DD Jr,et al.Tiotropium in COPD patients not previously receiving maintenance respiratory medications.Respir Med,2006,100:1495-1503.
9Beeh KM,Beier J,Buhl R,et al.Efficacy of tiotropium bromide(Spiriva) in patients with chronic-obstructive pulmonary disease(COPD) of different severities.Pneumologie,2006,60:341-346.
10Dusser D,Bravo ML,Iacono P.The effect of tiotropium on exacerbations and airflow in patients with COPD.Eur Respir J,2006,27:547-555.