Kaiser, Ann-Sophie
Maas, Bianca
Wolff, Anna
Sutter, Christian
Janssen, Johannes WG
Hinderhofer, Katrin
Moog, Ute
Article History
Received: 5 March 2014
Revised: 3 July 2014
Accepted: 9 July 2014
First Online: 13 August 2014
Competing interests
: The authors declare no conflict of interest.