Li, Da-Bing http://orcid.org/0000-0001-5353-1460
Sun, Xiao-Juan
Jia, Yu-Ping
Stockman, Mark I
Paudel, Hari P
Song, Hang
Jiang, Hong
Li, Zhi-Ming
Article History
Received: 31 January 2017
Revised: 6 March 2017
Accepted: 6 March 2017
First Online: 8 March 2017
Competing interests
: The authors declare no conflict of interest.