Dimitriev, D. A.
Saperova, E. V.
Dimitriev, A. D.
Indeikina, O. S.
Remizova, N. M.
Article History
Received: 28 December 2017
Revised: 1 April 2018
Accepted: 1 June 2018
First Online: 14 May 2019
COMPLIANCE WITH ETHICAL STANDARDS
: <i>Conflict of interests</i>. The authors declare that they have no conflict of interest.
: <i>Statement of compliance with standards of research involving humans as subjects</i>. The study was approved by the Ul’yanov Chuvash State University Ethics Committee for Expertise of Biomedical Investigations. All the students who participated in the study gave their written consent.