For citations:

Avdeev S.N. A role of fixed combinations of long-acting anticholinergics and long-acting #b2-agonists in therapy of chronic obstructive pulmonary disease. PULMONOLOGIYA. 2015;25(1):93-100. (In Russ.) https://doi.org/10.18093/0869-0189-2015-25-1-93-100