Zechel, Stefan
Geitner, Robert https://orcid.org/0000-0001-5419-4451
Abend, Marcus
Siegmann, Michael
Enke, Marcel
Kuhl, Natascha
Klein, Moritz
Vitz, Jürgen
Gräfe, Stefanie
Dietzek, Benjamin
Schmitt, Michael
Popp, Jürgen
Schubert, Ulrich S
Hager, Martin D
Article History
Received: 21 December 2016
Revised: 13 March 2017
Accepted: 1 April 2017
First Online: 18 August 2017
Competing interests
: The authors declare no conflict of interest.