Joos, C.
Bertheau, S.
Hauptvogel, T.
Auhuber, T.
Taube, C.
Bauer, M.
Schuster, M.
Article History
Received: 10 January 2020
Revised: 28 July 2020
Accepted: 9 August 2020
First Online: 22 September 2020
Compliance with ethical guidelines
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: C. Joos, S. Bertheau, T. Hauptvogel, T. Auhuber, C. Taube, M. Bauer and M. Schuster declare that they haves no competing interests.
: For this article no studies with human participants or animals were performed by any of the authors. All studies performed were in accordance with the ethical standards indicated in each case. Since only completely anonymous OR process data were used in this study, institutional review board permission and informed consent were not considered to be necessary.