Stoppenbrink, David
Daratsianos, Nikolaos
Kutschera, Eric
Scharf, Sven
Braumann, Bert
Götz, Werner
Jäger, Andreas
Reichert, Christoph
Article History
Received: 25 February 2019
Accepted: 29 April 2019
First Online: 3 June 2019
Compliance with ethical guidelines
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: D. Stoppenbrink, N. Daratsianos, E. Kutschera, S. Scharf, B. Braumann, W. Götz, A. Jäger and C. Reichert declare that they have no competing interests.
: This study was conducted in line with the requirements of the institutional review boards, national law, and the 1975 Declaration of Helsinki as revised in 2013. All patients and their legal representatives had been informed about the study and had consented to participate verbally and in writing. The study was registered in the German Clinical Trial Register (U1111-1132-6655).