Hennigs, Jan K.
Baumann, Hans Jörg
Lüneburg, Nicole
Quast, Gesine
Harbaum, Lars
Heyckendorf, Jan
Sydow, Karsten
Schulte-Hubbert, Bernhard
Halank, Michael
Klose, Hans
Article History
Received: 8 January 2014
Accepted: 24 March 2014
First Online: 28 April 2014
Competing interests
: The authors declare no competing financial interests.