Author contributions
(1) Concept or design: Wilson Chan, Alan Chiang, Daniel Cheuk, Vincent
Lee, Godfrey Chan
(2) Acquisition of data: Wilson Chan, Alison Ma, Eugene Chan, Amanda
Kan, Alan Chiang, Godfrey Chan
(3) Analysis or interpretation of data: Wilson Chan, Alison Ma, Amanda
Kan, Alan Chiang, Godfrey Chan
(4) Drafting of the article: Wilson Chan, Daniel Cheuk
(5) Critical revision for important intellectual content: Wilson Chan,
Alison Ma, Eugene Chan, Amanda Kan, Pamela Lee, Daniel Cheuk, Alan
Chiang, Wing Leung, Godfrey Chan