Received: 19 April 2020
Accepted: 28 January 2021
First Online: 3 February 2021
Ethics approval and consent to participate
: This study was approved by the Institutional Review Board of Taipei Veterans General Hospital (IRB number: 2018–05-005CC). Written consent was obtained from all patients who participated in this study.
: Not applicable.
: The authors declare that they have no competing interests.