Funding for this research was provided by:
Deutsche Forschungsgemeinschaft (DFG-RO 3671/8-1)
Received: 30 October 2017
Accepted: 29 January 2018
First Online: 26 February 2018
Ethics approval and consent to participate
: The ethics committee of the University Hospital Tuebingen (Eberhard-Karls Universität Tübingen; Ethik-Kommission; Gartenstraße 47;72074 Tübingen, Germany) approved the study.The project number is 370/2017/BO2.Informed consent was not required from the patients involved into this retrospective analysis. This proceeding was approved by the local ethics committee (project number 370/2017/BO2) of Eberhard Karls University Tuebingen since extraction of pseudonymous medical records provides structured data and therefore legally permits evaluation of the data for research.
: Not applicable.
: The authors declare that they have no competing interests.
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