Gavrilova, Olga A. http://orcid.org/0000-0003-2640-9659
Tikhonova, Olga A. http://orcid.org/0000-0002-0319-1477
Article History
Received: 30 December 2018
Accepted: 15 May 2019
First Online: 30 May 2019
Compliance with ethical standards
:
: The authors declared that they have no conflict of interest.