Funding for this research was provided by:
National Science Council (NSC101-3114-Y-002-003)
Received: 28 May 2020
Accepted: 27 October 2020
First Online: 17 November 2020
Ethics approval and consent to participate
: The study received ethical approval from the Institutional Review Board (IRB) of National Taiwan University (NTUH-REC-201303020RINC).
: Not applicable. This study uses unidentifiable data.
: The authors declare that they have no competing interests.