Received: 4 August 2020
Accepted: 7 October 2020
First Online: 17 October 2020
Ethics approval and consent to participate
: This study was registered at the University Hospital Medical Information Network (study No. UMIN000024670, date of registration: December 1, 2016) in Japanese Primary Registry Network; approved by the institutional review board of Saitama Medical Center, Jichi Medical University, Japan (RINS 16-003); the study was conducted in accordance with the Declaration of Helsinki (2004 Tokyo revision). All patients signed informed consent forms before participation.
: For publication of this study, agreement was obtained from each patient.
: Nikkiso Corporation provided support in the form of covering costs required for this study. There are no patents, products in development associated with this study to declare.NH is working as an associate editor of this journal. NH did not involve in the reviewing process of this article.