Xiao, Jia
Xing, Feiyue
Huo, Jie
Fung, Man Lung
Liong, Emily C.
Ching, Yick Pang
Xu, Aimin
Chang, Raymond Chuen Chung
So, Kwok Fai
Tipoe, George L.
Article History
Received: 29 January 2014
Accepted: 12 June 2014
First Online: 7 July 2014
Competing interests
: The authors declare no competing financial interests.