Kahl, Michael http://orcid.org/0000-0003-4055-5249
Wagner, Gerd
de la Cruz, Feliberto
Köhler, Stefanie
Schultz, C. Christoph
Article History
Received: 17 July 2018
Accepted: 6 December 2018
First Online: 12 December 2018
Compliance with ethical standards
:
: On behalf of all authors, the corresponding author states that there is no conflict of interest.