For citations:
Kalmanson L.M., Shlyk I.V., Polushin Yu.S., Stanevich O.V., Galkina A.A. The Effect of Nosocomial Infection on the Severity and Outcome of the Disease in Patients with Severe and Extremely Severe COVID-19. Messenger of ANESTHESIOLOGY AND RESUSCITATION. 2021;18(6):15-21. (In Russ.) https://doi.org/10.21292/2078-5658-2021-18-6-15-21