Vasilchenko, E
Escorpizo, R
Filatov, E
Kislova, A
Surodeyeva, Y
Lyachovetskaya, V
Zoloyev, G
Article History
Received: 19 July 2015
Revised: 23 June 2016
Accepted: 28 June 2016
First Online: 16 August 2016
Competing interests
: The authors declare no conflict of interest.