Alnawaiseh, Maged
Brand, Cristin
Bormann, Eike
Sauerland, Cristina
Eter, Nicole
Article History
Received: 17 May 2017
Accepted: 17 May 2018
First Online: 24 May 2018
Ethics approval and consent to participate
: The study was approved by the Ethics Committee of the University of Muenster, North Rhine Westphalia, Germany. Each participant signed an informed consent form. The study followed the tenets of the Declaration of Helsinki.
: The authors declare that they have no competing interests.
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