Yakovlev, A. A.
Druzhkova, T. A.
Nikolaev, R. V.
Kuznetsova, V. E.
Gruzdev, S. K.
Guekht, A. B.
Gulyaeva, N. V.
Article History
Received: 14 January 2019
Revised: 7 February 2019
Accepted: 12 February 2019
First Online: 11 December 2019
COMPLIANCE WITH ETHICAL STANDARDS
: <i>Conflict of interest</i>. None of the authors had conflict of interest to declare.
: <i>Ethical approval.</i> All procedures performed in studies involving human participants were conducted in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Informed consent was obtained from all individual participants involved in the study.