Fröschen, F. S.
Schell, S.
Schildberg, F. A.
Klausing, A.
Kohlhof, H.
Gravius, S.
Randau, T. M.
Article History
Received: 5 September 2019
First Online: 5 March 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest. No benefits have been or will be received from a commercial party related directly or indirectly to the subject matter of this article.
: 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. For this type of study formal consent is not required.