Voss, Ursula
Holzmann, Romain
Hobson, Allan
Paulus, Walter
Koppehele-Gossel, Judith
Klimke, Ansgar
Nitsche, Michael A
Article History
Received: 7 January 2014
Accepted: 16 April 2014
First Online: 11 May 2014
Competing interests
: The authors declare no competing financial interests.