Knipfer, Christian
Rohde, Maximilian
Oetter, Nicolai
Muench, Tim
Kesting, Marco Rainer
Stelzle, Florian
Article History
Received: 13 March 2018
Accepted: 14 November 2018
First Online: 14 December 2018
Ethics approval and consent to participate
: This study was approved by the Medical Ethical Committee of the University Clinic of Erlangen-Nuremberg (Stelzle_05102012). All of the participants gave signed consent before the evaluation. The study respected the principles of the ethics committee in charge as well as the 1975/1983 Helsinki declaration.
: Not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.