For citations:
Vizel AA, Vizel IY. Global initiative gold and national recommendations on the management of patients with chronic obstructive pulmonary disease (COPD): the place of double bronchodilation. Meditsinskiy sovet = Medical Council. 2019;(15):17-21. (In Russ.) https://doi.org/10.21518/2079-701X-2019-15-17-21