For citations:
Avdeev S.N., Nuralieva G.S., Chuchalin A.G. Efficacy and safety of short-acting anticholinergics in patients with acute exacerbation of chronic obstructive pulmonary disease receiving maintenance therapy with tiotropium. PULMONOLOGIYA. 2008;(1):62-68. (In Russ.) https://doi.org/10.18093/0869-0189-2008-0-1-62-68