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Authors
Petker, Waldemar
Weik, Ulrike
Margraf-Stiksrud, Jutta
Deinzer, Renate http://orcid.org/0000-0002-2867-4029
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Article History
Received: 29 November 2018
Accepted: 20 May 2019
First Online: 29 May 2019
Ethics approval and consent to participate
: The study protocol was conducted according to the principles of the Declaration of Helsinki and was approved by the local Ethics Committee of the Medical Faculty of the University of Giessen (reference number 124/16). All participants provided informed written consent.
: Not applicable
: All authors declare that they have no competing interests.
