Kaiser, C.
Tillmann, F. P.
Löchter, J.
Landgraeber, S.
Jäger, M.
Article History
Received: 10 June 2018
Accepted: 8 October 2018
First Online: 15 October 2018
Compliance with Ethical Standards
:
: All of the authors declare that they have no conflict of interest.
: All of the 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.