Münn, F.
Laun, R. A.
Asmus, A.
Bülow, R.
Bakir, S.
Haralambiev, L.
Eisenschenk, A.
Article History
Received: 16 August 2019
Accepted: 15 January 2020
First Online: 22 January 2020
Ethics approval and consent to participate
: The local institutional ethics committee of the University of Greifswald approved the study (BB 054/16) and stated that there are no ethical or legal concerns regarding this study. The decision was based on the Helsinki declaration. The need for consent for the retrospective use of patient data was waived by the institutional committee.
: Not applicable.
: The authors declare that they have no competing interests.