Funding for this research was provided by:
Text and Data Mining valid from 2018-06-21
Received: 12 February 2018
Accepted: 16 May 2018
First Online: 21 June 2018
Ethics approval and consent to participate
: We declare that the study has been performed in accordance with the Declaration of Helsinki and has been approved by the ethical Committee of the University of Würzburg (Ethical Committee Approval: Nr: 55/15 Date 1 February 2015).Written informed consent to participate in the study was obtained from each participant.
: The authors declare that they have no competing interests.
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