Tsukahara, Yoshinori https://orcid.org/0000-0002-1602-2728
Okajima, Yukinori
Yamada, Akira
Momose, Masanobu
Uehara, Takeshi
Shimizu, Akira
Soejima, Yuji
Fujinaga, Yasunari
Article History
Received: 5 November 2020
Accepted: 28 January 2021
First Online: 6 February 2021
Ethics approval and consent to participate
: The institutional review board of Shinshu University School of Medicine approved this retrospective study and waived the requirement for informed consent (IRB approval number: 3887).
: Not applicable.
: The authors declare that they have no competing interests.