Feller, Katrin https://orcid.org/0000-0002-7234-6794
Berendonk, Christoph https://orcid.org/0000-0002-3740-9358
Article History
Received: 22 September 2019
Accepted: 10 January 2020
First Online: 3 February 2020
Ethics approval and consent to participate
: Participation in the study was voluntary and participants could discontinue the study at any time. All participants signed an informed consent form. Confidentiality of data was maintained; data were only discussed within the research team.The study is deemed exempt from ethical approval based on the national legislation “Bundesgesetz über die Forschung am Menschen”, Art.2, Abs.1 ( ), as no patient data was involved.
: Not applicable.
: The authors declare that they have no competing interests.