Xu, Hai
Liu, Shuanglong
Ding, Zijing
Tan, Sherman J. R.
Yam, Kah Meng
Bao, Yang http://orcid.org/0000-0001-9868-4946
Nai, Chang Tai
Ng, Man-Fai
Lu, Jiong
Zhang, Chun http://orcid.org/0000-0002-1581-5806
Loh, Kian Ping
Article History
Received: 23 May 2016
Accepted: 12 August 2016
First Online: 4 October 2016
Competing interests
: The authors declare no competing financial interests.