Belyavtsev, A. N.
Melnikova, M. V.
Shevchenko, N. G.
Sapronov, G. V.
Vahrenev, R. G.
Shastina, N. S.
Kolesanova, E. F.
Nikolaeva, L. I.
Article History
Received: 13 July 2020
Revised: 25 July 2020
Accepted: 27 July 2020
First Online: 11 June 2021
COMPLIANCE WITH ETHICAL STANDARDS
: This study was carried out in compliance with the ethical standards set out in the Declaration of Helsinki (1975, 2013). The patients gave informed consent for the use of their blood sera for research purposes. The study was approved by the Ethics Committee of the Russian Medical Academy of Continuing Professional Education of the Ministry of Health of Russia.
: The authors declare they have no conflict of interest.