Funding for this research was provided by:
DFG ([BE 2056/5-1, GR 1102/5-1, GR 1687/2-1].)
Text and Data Mining valid from 2019-03-15
Received: 8 October 2018
Accepted: 10 January 2019
First Online: 15 March 2019
Ethics approval and consent to participate
: Approval by the ethics committee of the Landesärztekammer Rheinland-Pfalz (837.333.05(4991)) was obtained. All subjects gave written informed consent.
: not applicable.
: The authors declare that they have no competing interests.
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