Duteil, Delphine
Metzger, Eric
Willmann, Dominica
Karagianni, Panagiota
Friedrichs, Nicolaus
Greschik, Holger
Günther, Thomas
Buettner, Reinhard
Talianidis, Iannis
Metzger, Daniel
Schüle, Roland
Article History
Received: 20 December 2013
Accepted: 12 May 2014
First Online: 10 June 2014
Competing interests
: The authors declare no competing financial interests.