Funding for this research was provided by:
Heidelberg Foundation of Surgery
Received: 5 July 2018
Accepted: 23 January 2019
First Online: 18 February 2019
Ethics approval and consent to participate
: This prospective, observational, clinical study was approved by the local ethics committee (Ethics Committee of the Medical Faculty of Heidelberg; Trial-Code No. S-119/2015; German clinical trials register DRKS00008535). All study patients signed written informed consent.
: Not applicable.
: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.
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