Jiang, Hua
Tong, Yuxing
Yan, Dongjing
Jia, Shaohui
Ostenson, Claes-Goran
Chen, Zhengwang
Article History
Received: 8 April 2015
Accepted: 29 September 2015
First Online: 29 October 2015
Competing interests
: The authors declare no competing financial interests.