Spriewald, Bernd M.
Bach, Christian http://orcid.org/0000-0003-4675-7896
Zingsem, Juergen
Strobel, Julian
Winkler, Julia
Mackensen, Andreas http://orcid.org/0000-0002-0685-4483
Roesler, Wolf
Article History
Received: 16 December 2016
Revised: 23 February 2018
Accepted: 23 March 2018
First Online: 24 May 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.