van Dongen, J
Willemsen, G
Heijmans, B T
Neuteboom, J
Kluft, C
Jansen, R
Penninx, B W J
Slagboom, P E
de Geus, E J C
Boomsma, D I
Article History
Received: 11 July 2014
Revised: 28 November 2014
Accepted: 18 December 2014
First Online: 13 March 2015
Competing interests
: The authors declare no conflict of interest.