Funding for this research was provided by:
Georg-August-Universität Göttingen
Article History
Received: 26 February 2019
Accepted: 29 December 2019
First Online: 30 January 2020
Compliance with ethical standards
:
: Adam Stepniewski, Dominik Saul, Helen Synn, and Gunther Felmerer declare that they have no conflict of interest.
: No ethical approval was needed for this retrospective anonymized evaluation. The use of data was performed in accordance with WMA Declaration of Helsinki.
: Informed patient consent was obtained.
: Open Access funding provided by Projekt DEAL.