For citations:
Tseymakh I.Ya., Konovalov V.K., Sokol I.N., Usol'tseva S.G., Kostyuchenko G.I. Determination of chronic obstructive pulmonary disease exacerbation phenotypes using computed tomography. PULMONOLOGIYA. 2015;25(4):433-439. (In Russ.) https://doi.org/10.18093/0869-0189-2015-25-4-433-439