RT - journal article SR - Electronic T1 - SP - 2021-05-06 DO - 10.18481/2077-7566-20-17-1-70-75 A1 - , A1 - , A1 - , A1 - , A1 - , A1 - , YR - 2021 UL - https://covid19.neicon.ru/publication/7841 AB -