For citations:
Aisanov Z.R., Kalmanova E.N., Stulova O.Yu. Phenotype of chronic obstructive pulmonary disease with frequent exacerbations and current anti–inflammatory therapy. PULMONOLOGIYA. 2013;(1):68-76. (In Russ.) https://doi.org/10.18093/0869-0189-2013-0-1-68-76