Fedorov, Fedor http://orcid.org/0000-0002-2283-0086
Vasilkov, Michail
Lashkov, Andrey http://orcid.org/0000-0001-6794-8523
Varezhnikov, Alexey
Fuchs, Dirk
Kübel, Christian http://orcid.org/0000-0001-5701-4006
Bruns, Michael
Sommer, Martin
Sysoev, Victor http://orcid.org/0000-0002-0372-1802
Article History
Received: 3 April 2017
Accepted: 10 August 2017
First Online: 29 August 2017
Competing Interests
: The authors declare that they have no competing interests.