Meyer, Christian G
Intemann, Christopher D
Förster, Birgit
Owusu-Dabo, Ellis
Franke, Andre
Horstmann, Rolf D
Thye, Thorsten
Article History
Received: 19 December 2014
Revised: 26 June 2015
Accepted: 3 July 2015
First Online: 5 August 2015
Competing interests
: The authors declare no conflict of interest.