Chan, Ngai-Yin http://orcid.org/0000-0003-4650-6704
Choy, Chi-Chung
Yuen, Ho-Chuen
Chow, Hoi-Fan
Fong, Ho-Fai
Article History
Received: 26 September 2018
Accepted: 21 March 2019
First Online: 23 April 2019
Compliance with ethical standards
: The study protocol was approved by the Ethics Committee of the investigation centre. All patients gave written informed consent before recruitment into the study.
: The authors declare that they have no conflict of interest.