Funding for this research was provided by:
Text and Data Mining valid from 2018-03-09
Received: 3 January 2018
Accepted: 2 March 2018
First Online: 9 March 2018
Ethics approval and consent to participate
: All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national). Ethics committee of University Clinic Jena approved the study (2303-05/08).
: Not applicable.
: The authors declare that they have no competing interests.
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