Katsigiannis, Sotirios
Krischek, Boris
Barleanu, Stefanie
Grau, Stefan
Galldiks, Norbert
Timmer, Marco
Kabbasch, Christoph
Goldbrunner, Roland
Stavrinou, Pantelis
Article History
Received: 10 November 2018
Accepted: 7 April 2019
First Online: 29 April 2019
Ethics approval and consent to participate
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Written informed consent was obtained from all individual participants included in the study.
: Not applicable.
: The authors declare that they have no competing interests.
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