Received: 15 May 2020
Accepted: 25 July 2020
First Online: 1 August 2020
Ethics approval and consent to participate
: This study was approved by the Research Ethics Committee of Taipei Veterans General Hospital. Written informed consent was obtained from all patients or their legal representatives.
: No individual participant data were reported that would require consent from the participant to publish.
: The authors declare that they have no competing interests.