For citations:
Demko I.V., Mamaeva M.G., Kraposhina A.Yu., Sobko E.A., Gordeeva N.V., Sidorov S.A., Dyatlovskij V.V. The Difficulties of Differential Diagnosis of the Bronchial Obstruction Syndrome. The Russian Archives of Internal Medicine. 2021;11(4):292-296. https://doi.org/10.20514/2226-6704-2021-11-4-292-296