Fang, Mengjie
Dong, Di
Zeng, Chaoting
Liang, Xiao
Yang, Xin
Arranz, Alicia
Ripoll, Jorge
Hui, Hui
Tian, Jie
Article History
Received: 21 July 2015
Accepted: 7 December 2015
First Online: 11 January 2016
Competing interests
: The authors declare no competing financial interests.