Endo, Yuhei
Noda, Hiroshi
Watanabe, Fumiaki
Kato, Takaharu
Kakizawa, Nao
Ichida, Kosuke
Kasahara, Naoya
Rikiyama, Toshiki
Article History
Received: 11 October 2018
Accepted: 7 March 2019
First Online: 18 March 2019
Compliance with Ethical Standards
:
: The authors declare that they have no conflict of interest.
: This study was reviewed and approved by the Ethics Committee of Saitama Medical Center, Jichi Medical University.
: Patients were not required to give their informed consent for inclusion in this retrospective study because we used anonymous clinical data and no individuals could be identified from the data. We announced this study on our institution’s website with an explanation about the patients’ right to refuse inclusion in the present study and about the study’s publication.