For citations:
Shpagina L.A., Shpagin I.S., Kotova O.S., Pospelova T.I., Gerasimenko O.N. Treatment of different phenotypes of chronic obstructive pulmonary disease. PULMONOLOGIYA. 2016;26(6):681-693. (In Russ.) https://doi.org/10.18093/08690189201626681693