Kawai, Taisuke
Tanaka, Ray
Yeung, Andy Wai Kan
von Arx, Thomas
Bornstein, Michael M. http://orcid.org/0000-0002-7773-8957
Article History
Received: 31 January 2018
Accepted: 20 June 2018
First Online: 28 June 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All procedures performed 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. The study protocol was submitted to and approved by the local institutional review board (IRB) of the University of Hong Kong/Hospital Authority Hong Kong West Cluster (approval number UW 17-462).
: For this type of study (retrospective study), formal consent is not required.