Funding for this research was provided by:
Ministry of Health and Welfare (M05B4342)
Received: 8 April 2020
Accepted: 3 September 2020
First Online: 7 September 2020
Ethics approval and consent to participate
: The study was reviewed and approved by the Institutional Review Board (IRB) of the Tri-Service General Hospital (TSGHIRB No.: 1–105–05-080) before the study began. Each subject signed the informed consent form at the time of enrollment.
: The authors have stated explicitly that there are no conflicts of interest in connection with this article.