Funding for this research was provided by:
National Health Insurance Administration (MOHW106-NHI-S-114-000018)
Received: 16 April 2019
Accepted: 14 February 2020
First Online: 19 February 2020
Ethics approval and consent to participate
: This study was reviewed by the Institutional Review Board of National Cheng Kung University Hospital, and ethical review was waived because of the use of open data.
: Not Applicable.
: The authors declare that they have no competing interests.