Alexander, Sprygin
Olga, Byadovskaya
Svetlana, Kononova
Valeriy, Zakharov
Yana, Pestova
Pavel, Prutnikov
Aleksandr, Kononov
Article History
Received: 8 May 2019
Accepted: 26 June 2019
First Online: 1 July 2019
Ethics approval and consent to participate
: Not required.
: Not applicable.
: The authors declare that they have no competing interests.