Ma, Ming
Rateb, Mostafa E
Yang, Dong
Rudolf, Jeffrey D
Zhu, Xiangcheng
Huang, Yong
Zhao, Li-Xing
Jiang, Yi
Duan, Yanwen
Shen, Ben
Article History
Received: 1 April 2016
Revised: 23 June 2016
Accepted: 11 July 2016
First Online: 10 August 2016
Competing interests
: The authors declare no conflict of interest.
Free to read: This content has been made available to all.