Abe, Toshikazu
Komori, Akira
Shiraishi, Atsushi
Sugiyama, Takehiro
Iriyama, Hiroki
Kainoh, Takako
Saitoh, Daizoh
Article History
Received: 14 November 2019
Accepted: 7 May 2020
First Online: 15 May 2020
Ethics approval and consent to participate
: The study protocol was reviewed and approved by the ethics committee of Juntendo University, Japan (IRB No.19-010). The requirement of informed consent from study participants was waived by the ethics committees because of the retrospective and anonymized nature of this study.
: Not applicable.
: All authors declare that they have no competing interests.