Leung, H. T. http://orcid.org/0000-0003-4994-2755
Woo, Y. C.
Fong, C. H. Y.
Tan, K. C. B.
Lau, E. Y. F.
Chan, K. W.
Leung, J. Y. Y.
Article History
Received: 25 January 2019
Accepted: 7 September 2019
First Online: 16 September 2019
Compliance with ethical standards
:
: On behalf of all authors, the corresponding author states that there is no conflict of interest.
: This article does not contain any studies with animals performed by any of the authors. And the study had been approved by the respective Research Ethics Committee and Institutional Review Board of Hospital Authority in Hong Kong respectively (HKEC-2015-066, UW-16-069, KW/EX-16-081(98-24)).
: The study was conducted on retrospectively collected patient records and there are no patient identifiers in the article. Therefore, informed consent was not required according to the respective research ethnics committee and institutional review board.