@article{2021-01-01,
author = {, , },
title = {},
year = {2021},
doi = {10.3103/S0147688221010068},
publisher = {NP «NEICON»},
abstract = {},
URL = {https://covid19.neicon.ru/publication/6726},
eprint = {https://covid19.neicon.ru/files/2748},
}