Funding for this research was provided by:
Bundesministerium für Bildung und Forschung (16SV7562)
Received: 22 September 2017
Accepted: 8 February 2018
First Online: 13 February 2018
Ethics approval and consent to participate
: The study was approved and consent from the local ethic committee of the University of Regensburg with the registration number 15–101-0090. Written consent was given by each patient to collect their data and to publish it in an anonymous way.
: Not applicable
: The authors declare that they have no competing interest.
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