Li, Baojuan
Friston, Karl J.
Liu, Jian
Liu, Yang
Zhang, Guopeng
Cao, Fenglin
Su, Linyan
Yao, Shuqiao
Lu, Hongbing
Hu, Dewen
Article History
Received: 10 March 2014
Accepted: 28 April 2014
First Online: 22 May 2014
Competing interests
: The authors declare no competing financial interests.