Funding for this research was provided by:
Stipendienstiftung Rheinland-Pfalz, Germany
Article History
Received: 10 July 2017
Accepted: 4 August 2018
First Online: 24 August 2018
Compliance with Ethical Standards
:
: Eva Kiefhaber declares that she has no conflict of interest. Kathryn Pavlovich declares that she has no conflict of interest. Katharina Spraul declares that she has no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained from all individual participants included in the study.