Received: 23 October 2020
Accepted: 8 February 2021
First Online: 18 February 2021
Ethics approval and consent to participate
: The data utilized in this study cannot be made available in the paper, or in a public repository. Requests for raw data need to be permitted by the NHIRD Office (ExternalRef removed). The NHIRD office has permitted us to use the data for this study. In the LHID2000, information that could be used to identify individuals or care providers is concealed before release to researchers. The Research Ethics Committee of China Medical University and Hospital approved our study (CMUH104-REC2–115) and waived the need for informed consent.
: Not applicable.
: The authors that they have no competing interests.