Rozov, Alexey
Demeshkina, Natalia
Khusainov, Iskander
Westhof, Eric
Yusupov, Marat
Yusupova, Gulnara
Article History
Received: 8 October 2015
Accepted: 13 December 2015
First Online: 21 January 2016
Competing interests
: The authors declare no competing financial interests.