Text and Data Mining valid from 2020-04-07
Received: 1 October 2019
Accepted: 23 March 2020
First Online: 7 April 2020
Ethics approval and consent to participate
: The study was approved by the Chinese University of Hong Kong Institutional Review Board committee (Ref No.: SBRE-18-268).
: Not applicable
: The authors declare that they have no competing interests.