For citations:
Chelenkova I.N., Bunyatyan N.D., Trofimenko I.Yu. Efficacy of the bacterial lysate as a means of preventing COPD exacerbations in patients with different histories of previous exacerbations. Kursk Scientific and Practical Bulletin "Man and His Health". 2017;(1):46-50. (In Russ.) https://doi.org/10.21626/vestnik/2017-1/08