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Authors
Wallner, A.
Faestermann, T.
Feige, J.
Feldstein, C.
Knie, K.
Korschinek, G.
Kutschera, W.
Ofan, A.
Paul, M.
Quinto, F.
Rugel, G.
Steier, P.
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Article History
Received: 30 March 2014
Accepted: 26 November 2014
First Online: 20 January 2015
Competing interests
: The authors declare no competing financial interests.
