Dickreuter, E
Eke, I
Krause, M
Borgmann, K
van Vugt, M A
Cordes, N
Article History
Received: 20 October 2014
Revised: 8 April 2015
Accepted: 12 April 2015
First Online: 15 June 2015
Competing interests
: The authors declare no conflict of interest.