For citations:
Avdeev S.N., Tsareva N.N., Merzhoeva Z.M., Trushenko N.V., Yaroshetskiy A.I. Practical guidance for oxygen treatment and respiratory support of patients with COVID-19 infection before admission to intensive care unit. PULMONOLOGIYA. 2020;30(2):151-163. (In Russ.) https://doi.org/10.18093/0869-0189-2020-30-2-151-163