Text and Data Mining valid from 2019-12-01
Received: 7 August 2019
Accepted: 28 October 2019
First Online: 4 December 2019
Ethics approval and consent to participate
: The study protocol (CRE-2016.366) was approved by the Ethics Committee of The Chinese University of Hong Kong-New Territories East Cluster Hospitals. Written informed consent was obtained from all subjects prior to participate in study.
: Not applicable.
: The authors declare that they have no competing interests.