Ip, Carman K. M.
Li, Shan-Shan
Tang, Matthew Y. H.
Sy, Samuel K. H.
Ren, Yong
Shum, Ho Cheung
Wong, Alice S. T.
Article History
Received: 2 October 2015
Accepted: 9 May 2016
First Online: 1 June 2016
Competing interests
: The authors declare no competing financial interests.