Hussong, M
Börno, S T
Kerick, M
Wunderlich, A
Franz, A
Sültmann, H
Timmermann, B
Lehrach, H
Hirsch-Kauffmann, M
Schweiger, M R
Article History
Received: 8 November 2013
Revised: 10 February 2014
Accepted: 10 March 2014
First Online: 24 April 2014
Competing interests
: The authors declare no conflict of interest.