Pan, F.
Loos, M.
Do, T. D.
Richter, G. M.
Kauczor, H. U.
Hackert, T.
Sommer, C. M.
Article History
Received: 8 August 2020
Accepted: 1 October 2020
First Online: 2 November 2020
Ethics approval and consent to participate
: 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. Since this study was a retrospective audit of anonymised patient records, formal retrospective consent was not required.
: Not applicable.
: The authors declare that they have no competing interests.