Funding for this research was provided by:
Bundesministerium für Bildung und Forschung (01KG0912)
Text and Data Mining valid from 2019-05-10
Received: 2 July 2018
Accepted: 17 April 2019
First Online: 10 May 2019
Ethics approval and consent to participate
: Ethics approval was obtained from the ethics-committee of the medical faculty of the Friedrich-Alexander-Universität Erlangen-Nürnberg (protocol No. 2009–009871-36); informed consent was obtained from all participants and their parents.
: not applicable.
: The authors declare that they have no competing interests.
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