Funding for this research was provided by:
Health and Medical Research Fund, Food & Health Bureau, HKSAR Government (13140671)
Text and Data Mining valid from 2019-09-13
Received: 25 February 2019
Accepted: 5 September 2019
First Online: 13 September 2019
Ethics approval and consent to participate
: This study was approved by the Joint CUHK-NTEC Clinical Research Ethics Committee (CRE-2015.164). Each patient had given written informed consent to join the study.
: Not applicable
: The authors declare that they have no competing interests.