For citations:
Avdeev S.N., Demko I.V., Zaytsev A.A., Ignatova G.L., Kravchenko N.Yu., Leshchenko I.V., Ovcharenko S.I., Sinopal’nikov A.I., Frantsuzevich L.Ya. Federal guidelines on diagnosis and treatment of chronic bronchitis. PULMONOLOGIYA. 2022;32(3):448-472. (In Russ.) https://doi.org/10.18093/0869-0189-2022-32-3-448-472