Funding for this research was provided by:
University Research Committee, University of Hong Kong
Text and Data Mining valid from 2020-04-28
Received: 14 October 2019
Accepted: 16 April 2020
First Online: 28 April 2020
Ethics approval and consent to participate
: The present study was approved by the Institutional Review Board of the University of Hong Kong/Hospital Authority Hong Kong West Cluster.
: Informed written consents were obtained from both the eligible subjects.
: The authors declare that they have no competing interests.