Received: 7 August 2020
Accepted: 20 October 2020
First Online: 10 November 2020
Ethics approval and consent to participate
: The ethics committee at Nihon University School of Medicine approved this study (registration number RK-150414-4). The written informed consent was obtained from all patients.
: The work presented herein is original, has not been previously published in whole or in part, and is not under consideration for publication in any other journal. If accepted, the authors agree that the paper will not be published elsewhere in the same or similar form, in English or in any other language, without written consent of the copyright holder.
: The authors have no conflicts of interest or financial supports to declare in relation to this study.