Funding for this research was provided by:
Seed Fund for Basic Research, HKU (201804159013)
Text and Data Mining valid from 2019-12-01
Received: 25 September 2019
Accepted: 26 November 2019
First Online: 11 December 2019
Ethics approval and consent to participate
: The study protocol was approved by the institutional review board: HKWC (UW19–179). All procedures performed in studies involving human participants 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.
: Written informed consent was obtained from all individual participants included in the study.
: All authors declare they have no conflict of interest.