Ninkina, Natalia
Connor-Robson, Natalie
Ustyugov, Alexey A.
Tarasova, Tatiana V.
Shelkovnikova, Tatyana A.
Buchman, Vladimir L.
Article History
Received: 4 September 2015
Accepted: 16 October 2015
First Online: 13 November 2015
Competing interests
: The authors declare no competing financial interests.