Endres, Stefan C. http://orcid.org/0000-0002-9501-2762
Sandrock, Carl http://orcid.org/0000-0003-2828-5186
Focke, Walter W. http://orcid.org/0000-0002-8512-8948
Funding for this research was provided by:
National Research Foundation (92781)
Article History
Received: 4 January 2017
Accepted: 19 March 2018
First Online: 27 March 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.