Funding for this research was provided by:
Bundesministerium für Bildung und Forschung (03ZZ0804 A-C)
Text and Data Mining valid from 2018-05-04
Received: 16 January 2017
Accepted: 30 April 2018
First Online: 4 May 2018
Ethics approval and consent to participate
: Ethical approval was obtained from the Ethic Committee of the Jena University Hospital (4742–03/16). All participants received a brief explanation of the aims of the questionnaire survey and were informed that the participation was voluntary and that the data analysis would be anonymous. Since no personal data, such as signatures, should be collected, the return of the questionnaire was considered as consent to participate in the study.
: The authors declare that they have no competing interests.
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