Chan, Nelson C. N.
Cheng, Chi-Keung
Chan, Kelvin C. F.
Wong, Connie M. L.
Lau, Kin-Mang
Kwong, Joyce H. Y.
Chan, Natalie P. H.
Wong, Wai-Shan
Chow, Eudora Y. D.
Wong, Michael L. G.
Chu, Raymond W.
Ip, Rosalina K. L.
Ng, Margaret H. L.
Article History
First Online: 10 May 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained from all individual participants included in the study.