Li, Qiye
Wang, Zongji
Lian, Jinmin
Schiøtt, Morten
Jin, Lijun
Zhang, Pei
Zhang, Yanyan
Nygaard, Sanne
Peng, Zhiyu
Zhou, Yang
Deng, Yuan
Zhang, Wenwei
Boomsma, Jacobus J.
Zhang, Guojie
Article History
Received: 21 November 2013
Accepted: 8 August 2014
First Online: 30 September 2014
Competing interests
: The authors declare no competing financial interests.