For citations:
Avdeev S.N., Belevskiy A.S., Ezhov A.V., Kostina N.E., Bazdyrev E.D., Argunova A.N., Van’kova V.I., Nil’k R.Ya., Petrakovskaya V.A., Izyumova G.V. Phenotypes of chronic obstructive pulmonary disease and approaches to treatment of acute exacerbations of COPD in Russian Federation: results of NIS CLOUD non-interventional study. PULMONOLOGIYA. 2018;28(4):411-423. (In Russ.) https://doi.org/10.18093/0869-0189-2018-28-4-411-423