4Vestbo J, Hurd SS, Aqusti AG, et al. Global strategy for the diagnosis, management and prevention of Chronic Ob- structive pulmonary disease.. GOLD executive summary [J]. Am J Respir Crit Care Med,2013,187(4) ..347-365.
5Saito Y, Azuma A, Morimoto T, et al. Tiotropium amelio- rates symptoms in patients with chronic airway mucus hy- persecretion which is resistant to macrolide therapy[J]. Intern Med, 2008,47 (7) : 585 - 591.
6Hoshino M, Ohtawa J. Effects of adding salmeterol/fluti- casone propionate to tiotropium on airway dimensions in patients with chronic obstructive pulmonary disease[J]. Respirology, 2011,16(1) : 95 - 101.
