For citations:

Radtsig E.Yu., Radtsig A.N., Varavina M.A. Protective properties of the mucosa of the upper respiratory tract and methods of their activation. Rossiyskiy Vestnik Perinatologii i Pediatrii (Russian Bulletin of Perinatology and Pediatrics). 2021;66(1):140-146. (In Russ.) https://doi.org/10.21508/1027-4065-2021-66-1-140-146