Fraune, Sebastian
Anton-Erxleben, Friederike
Augustin, René
Franzenburg, Sören
Knop, Mirjam
Schröder, Katja
Willoweit-Ohl, Doris
Bosch, Thomas C G
Article History
Received: 5 March 2014
Revised: 23 October 2014
Accepted: 13 November 2014
First Online: 16 December 2014
Competing interests
: The authors declare no conflict of interest.