Pylypovskyi, Oleksandr V.
Sheka, Denis D.
Kravchuk, Volodymyr P.
Yershov, Kostiantyn V.
Makarov, Denys
Gaididei, Yuri
Article History
Received: 2 December 2015
Accepted: 3 March 2016
First Online: 24 March 2016
Competing interests
: The authors declare no competing financial interests.