Litmanovich, Ekaterina A.
Kotova, Ekaterina V.
Efremov, Vladislav V.
Article History
Received: 15 August 2018
Revised: 1 October 2018
Accepted: 27 October 2018
First Online: 19 November 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.