Abelyan, N.
Grabski, H.
Tiratsuyan, S.
Article History
Received: 20 April 2019
Revised: 20 April 2019
Accepted: 6 May 2019
First Online: 25 February 2020
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>. All procedures used in this work comply with the ethical standards of the Institutional Ethics Committee and the 1964 Declaration of Helsinki and its later amendments or comparable ethical standards.