Bürklein, Sebastian
Schäfer, Edgar
Jöhren, Hans-Peter
Donnermeyer, David
Article History
Received: 28 March 2019
Accepted: 20 June 2019
First Online: 15 July 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Not required.