Knorr, Alexandra G. http://orcid.org/0000-0003-4457-9301
Schmidt, Christian
Tesina, Petr
Berninghausen, Otto http://orcid.org/0000-0002-9255-0522
Becker, Thomas
Beatrix, Birgitta http://orcid.org/0000-0001-5568-8533
Beckmann, Roland http://orcid.org/0000-0003-4291-3898
Article History
Received: 25 July 2018
Accepted: 9 November 2018
First Online: 17 December 2018
Competing interests
: The authors declare no competing interests.