van Eijk, Kristel R
de Jong, Simone
Strengman, Eric
Buizer-Voskamp, Jacobine E
Kahn, René S
Boks, Marco P
Horvath, Steve
Ophoff, Roel A
Article History
Received: 21 August 2013
Revised: 28 August 2013
Accepted: 30 September 2014
First Online: 26 November 2014
Competing interests
: The authors declare no conflict of interest.