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Authors
Schultz, Johannes A.
Beck, Christoph
Menz, Gunter
Neuwirth, Burkhard
Ohlwein, Christian
Philipp, Andreas
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Article History
Received: 9 March 2015
Accepted: 20 November 2015
First Online: 21 December 2015
Competing interests
: The authors declare no competing financial interests.
