Endo, Kenji
Kaneko, Asuka
Horiuchi, Yuhei
Kasuga, Noriko
Ishizaki, Umiko
Sakai, Shuji
Article History
Received: 13 January 2020
Accepted: 10 March 2020
First Online: 20 March 2020
Compliance with ethical standards
:
: The authors have that they have no conflicts of interest.
: The Institutional Review Board approved this study. The requirement for informed consent was waived because it was a retrospective study.
: This retrospective, single-institution study was approved by an institutional review board of our facility. Written informed consent for the inclusion of individual patient data in the analysis was waived because of the retrospective nature of the investigation.