For citations:
Beloglazov V.A., Popenko Yu.O., Gordienko A.I. Efficacy of a selective phosphodiesterase 4 inhibitor in patients with asthma–COPD overlap syndrome. PULMONOLOGIYA. 2015;25(3):327-332. (In Russ.) https://doi.org/10.18093/0869-0189-2015-25-3-327-332