Fröschen, F. S.
Randau, T. M.
Hischebeth, G. T. R.
Gravius, N.
Gravius, S.
Walter, S. G.
Article History
Received: 23 July 2019
First Online: 9 December 2019
Compliance with ethical standards
:
: The authors declare that they do not have a conflict of interest. No benefits directly or indirectly related to the subject matter of this article have been or will be received from a commercial party.
: 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. Formal consent is not required for this type of study.