Selzam, S
Krapohl, E
von Stumm, S
O'Reilly, P F
Rimfeld, K
Kovas, Y
Dale, P S
Lee, J J
Plomin, R
Article History
Received: 1 April 2016
Revised: 10 May 2016
Accepted: 23 May 2016
First Online: 19 July 2016
Competing interests
: The authors declare no conflict of interest.