Ragger, Klemens
Hiebler-Ragger, Michaela
Herzog, Günter
Kapfhammer, Hans-Peter
Unterrainer, Human Friedrich
Article History
Received: 5 May 2018
Accepted: 21 February 2019
First Online: 11 March 2019
Ethics approval and consent to participate
: All participants gave their written informed consent before completing the questionnaires. The study was conducted in agreement with the Declaration of Helsinki and approved by the Ethics Committee of the Medical University of Graz, Austria.
: Not applicable.
: The authors declare that they have no competing interests.
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