Zheng, L
Wu, J
Wang, G
Persuitte, G
Ma, Y
Zou, L
Zhang, L
Zhao, M
Wang, J
Lan, Qin
Liu, Z
Fan, H
Li, J
Article History
Received: 26 April 2014
Revised: 6 June 2015
Accepted: 1 July 2015
First Online: 2 September 2015
Competing interests
: The authors declare no conflict of interest.