Jacquemyn, Hans
Waud, Michael
Merckx, Vincent S. F. T.
Brys, Rein
Tyteca, Daniel
Hedrén, Mikael
Lievens, Bart
Article History
Received: 9 March 2016
Accepted: 26 October 2016
First Online: 24 November 2016
Competing interests
: The authors declare no competing financial interests.