6Calverley PMA, Anderson JA, Celli B. for the TORCH investigators. Salmeterol and fluticasone propionate and survival in chronic obstructive puhnonary disease[ J]. NEJM ,2007,356:775 - 789.
7Almagro P, Calbo E, Ochoa de Eehagtien A, et al. Mortality after hospitalisation for COPD [ J ]. Chest,2002,121 : 1441 - 1448.
8Soler-Catalu? a JJ, Martinez- Garcia MA, Roman Sanchez P, et al. Severe acute exacerbations and mortality in patients with chronic obstructive pulmonary disease [ J ]. Thorax, 2005,60 : 925 -931.
9Comez FP, Rodriguez - Roisin R. Global Initiative for Chronic Obstructive Lung Disease (GOLD) guidelines for chronic obstructive pulmonary disease [ J ]. Curr Opin Pulm Med, 2002,8 ( 2 ) : 81 - 86.
10Disse B, Speck GA, Rominger KL, Witek TJ Jr, Hammer R. Tiotropium (Spiriva): mechanistical considerations and clinical profile in obstructive lung disease [ J ]. Life Sci, 1999,64 (6 - 7 ) : 457 - 464.
