Held, Felix E.
Guryev, Anton A.
Fröhlich, Tony
Hampel, Frank
Kahnt, Axel
Hutterer, Corina
Steingruber, Mirjam
Bahsi, Hanife
von Bojničić-Kninski, Clemens
Mattes, Daniela S.
Foertsch, Tobias C.
Nesterov-Mueller, Alexander
Marschall, Manfred
Tsogoeva, Svetlana B.
Article History
Received: 21 July 2016
Accepted: 27 February 2017
First Online: 2 May 2017
Competing interests
: The authors declare no competing financial interests.