Markelov, Denis A.
Matveev, Vladimir V.
Ingman, Petri
Nikolaeva, Marianna N.
Penkova, Anastasia V.
Lahderanta, Erkki
Boiko, Natalia I.
Chizhik, Vladimir I.
Article History
Received: 29 October 2015
Accepted: 18 March 2016
First Online: 7 April 2016
Competing interests
: The authors declare no competing financial interests.