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Authors
Renner, Wilfried
Krenn-Pilko, Sabine
Gruber, Hans-Jürgen
Herrmann, Markus
Langsenlehner, Tanja
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Article History
Received: 21 February 2018
Revised: 23 April 2018
Accepted: 3 May 2018
First Online: 6 August 2018
Compliance with ethical standards
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: The study has been approved by the Ethical Committee of the Medical University of Graz and has therefore been performed in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki and its later amendments. Written informed consent was obtained from all participating subjects.
: The authors declare that they have no conflict of interest.
