RT - journal article SR - Electronic T1 - SP - 2021-04-27 DO - 10.33266/2070-1004-2020-2-67-70 A1 - , A1 - , A1 - , A1 - , A1 - , A1 - , YR - 2021 UL - https://covid19.neicon.ru/index.php/publication/2526 AB -