Lücker, Sebastian
Schwarz, Jasmin
Gruber-Dorninger, Christiane
Spieck, Eva
Wagner, Michael
Daims, Holger
Article History
Received: 31 March 2014
Revised: 4 July 2014
Accepted: 18 July 2014
First Online: 2 September 2014
Competing interests
: The authors declare no conflict of interest.