Yao, Qiaofeng http://orcid.org/0000-0002-5129-9343
Yuan, Xun
Fung, Victor
Yu, Yong http://orcid.org/0000-0002-6271-707X
Leong, David Tai
Jiang, De-en http://orcid.org/0000-0001-5167-0731
Xie, Jianping http://orcid.org/0000-0002-3254-5799
Article History
Received: 15 January 2017
Accepted: 9 August 2017
First Online: 13 October 2017
Competing interests
: The authors declare no competing financial interests.