Hegedűs, Ferenc
Lauterborn, Werner
Parlitz, Ulrich
Mettin, Robert
Funding for this research was provided by:
Deutsche Forschungsgemeinschaft (ME 1645/7-1)
Article History
Received: 28 December 2017
Accepted: 12 May 2018
First Online: 29 May 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.