Received: 25 April 2021
Accepted: 21 January 2022
First Online: 1 February 2022
: The present study was approved by the Institutional Review Board of the Taipei Veterans General Hospital (2018–07-016 AC). No written consent from the study participants was required, because the NHI data set comprised de-identified secondary data for use in research. The Institutional Review Board of Taipei Veterans General Hospital issued a formal written waiver for the requirement of consent. All methods were performed in accordance with the relevant guidelines and regulations.
: Not applicable<b>.</b>
: The author(s) declare(s) that they have no competing interests.