For citations:

Vatutin M.T., Smyrnova G.S., Taradin G.G. CHRONIC OBSTRUCTIVE PULMONARY DISEASE: DEFINITION, EPIDEMIOLOGY, PATHOPHYSIOLOGY, CLINICAL PICTURE AND TREATMENT (GOLD 2013). The Russian Archives of Internal Medicine. 2015;(6):3-13. (In Russ.) https://doi.org/10.20514/2226-6704-2015-0-6-3-13