For citations:
Zykov K.A., Ovcharenko S.I., Avdeev S.N., Zhestkov A.V., Il'kovich M.M., Nevzorova V.A., Farkhutdinov U.R., Khamitov R.F., Rvacheva A.V., Chuchalin A.G. Phenotypic characteristics of COPD patients with a smoking history in POPE-study in the Russian Federation. PULMONOLOGIYA. 2020;30(1):42-52. (In Russ.) https://doi.org/10.18093/0869-0189-2020-30-1-42-52
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