Pöppel, Katharina https://orcid.org/0000-0002-6573-3761
Büsch, Dirk
Article History
Received: 16 July 2018
Accepted: 16 January 2019
First Online: 18 February 2019
Compliance with ethical guidelines
:
: K. Pöppel and D. Büsch declare that they have no competing interests.
: The study was approved by the Ethics Comission of the Carl von Ossietzky University Oldenburg. All procedures involving human participants were in accordance with the Declaration of Helsinki. Informed consent was obtained from all individual participants included in the study.