Stindt, M H
Muller, P A J
Ludwig, R L
Kehrloesser, S
Dötsch, V
Vousden, K H
Article History
Received: 2 April 2014
Revised: 4 September 2014
Accepted: 14 September 2014
First Online: 24 November 2014
Competing interests
: The authors declare no conflict of interest.