Funding for this research was provided by:
Aesculap AG
Article History
Received: 10 October 2017
Accepted: 28 September 2018
First Online: 17 October 2018
Ethics approval and consent to participate
: The conduct of this study will comply with the International Conference for Harmonization Good Clinical Practice (ICH-GCP) regulations and guidelines and the current revision of the Declaration of Helsinki. Approval was obtained from the Charité Ethics Board on 2 September 2016 (EA1/234/16). Informed consent will be obtained from all participants before inclusion in the study. Participants may withdraw consent at any time.
: Not applicable.
: The authors declare that they have no competing interests.
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