Funding for this research was provided by:
Chi Mei Medical Center (CCFHR10701)
Received: 23 February 2019
Accepted: 21 July 2020
First Online: 8 August 2020
Ethics approval and consent to participate
: This study was approved by the Institutional Review Board (IRB) of the Chi Mei Medical Center, Taiwan (10705-E04). The National Health Insurance Research Database (NHIRD) was acquired by the Chi Mei Medical Center with permission to access the data in this study.
: Not applicable.
: The authors declare that they have no competing interests.