Received: 11 November 2020
Accepted: 13 April 2021
First Online: 4 May 2021
: This study was approved by the Institutional Review Board of Taipei Veterans General Hospital, which was conformed to the provisions of the World Medical Association’s Declaration of Helsinki (IRB-TPEVGH No.: 2016–06-009A). The written informed consent for each participant was obtained before study enrollment.
: The authors declare no conflicts of interests.