Author contributions
(1) Concept or design: Wilson YK Chan, Joanna YL Tung
(2) Acquisition of data: Wilson YK Chan, Eric CY Law, TK Ling, Felix CK Wong, Joanna YL Tung
(3) Analysis or interpretation of data: Wilson YK Chan, Eric CY Law, TK Ling, Felix CK Wong, Daniel KL Cheuk, Joanna YL Tung
(4) Drafting of the article: Wilson YK Chan
(5) Critical revision for important intellectual content: Wilson YK Chan, Eric CY Law, TK Ling, Felix CK Wong, Daniel KL Cheuk, Joanna YL Tung
All authors had full access to the data, contributed to the study, approved the final version for publication, and take responsibility for its accuracy and integrity.