Received: 27 May 2020
Accepted: 7 March 2021
First Online: 17 March 2021
: The present study was approved by the Institutional Review Board of the University of Hong Kong and the Hospital Authority Hong Kong West Cluster, Hong Kong. All subjects provided <i>written</i> informed consent to participate.
: Not applicable.
: LYM is an advisory board member for Gilead Sciences. WKS received speaker fees, is an advisory board member and received research funding from Gilead Sciences. MFY served as advisor/ consultant for and received grant/ research supports from Gilead Sciences. DKW and JF have no potential conflict of interest to disclose.