Article History
Received: 5 November 2020
Accepted: 19 February 2021
First Online: 18 March 2021
Declarations
:
: The IRB at National Yang-Ming University approves the use of anonymous mortality data. The data satisfy ethics approval. The ID of the IRB approval is “YM107045E.” All authors have approved the manuscript.
: The authors declare that they have no conflicts of interest.