Appel, Markus http://orcid.org/0000-0001-6069-7573
Frick, Bernhard http://orcid.org/0000-0001-8570-4549
Magerl, Andreas
Funding for this research was provided by:
Bundesministerium für Bildung und Forschung (05K16WEA and 05K13WE1, 05K16WEA and 05K13WE1, 05K16WEA and 05K13WE1)
Article History
Received: 22 May 2018
Accepted: 24 August 2018
First Online: 11 September 2018
Competing Interests
: The authors declare no competing interests.