Brandes, Mirko https://orcid.org/0000-0003-2926-4758
Wirsik, Norman
Niehoff, Hanna
Heimsoth, Jörg
Möhring, Bernd
Article History
Received: 3 July 2017
Accepted: 11 June 2018
First Online: 30 June 2018
Ethics approval and consent to participate
: The study was approved by the local ethics committee, Oldenburg University, Germany. All participants provided written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.
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