Kikkawa, Nao http://orcid.org/0000-0002-5694-6407
Ito, Kimiteru
Yoshida, Hiroshi
Kato, Mayumi Kobayashi
Kubo, Yuko
Onishi, Yasuyuki
Sugawara, Haruto
Kato, Tomoyasu
Kusumoto, Masahiko
Article History
Received: 10 July 2020
Accepted: 17 December 2020
First Online: 30 January 2021
Compliance with ethical standards
:
: None.
: This retrospective study was approved by the relevant institutional ethics committee and was conducted in accordance with the principles of the Declaration of Helsinki. The requirement to obtain written informed consent was waived because of the retrospective nature of the study.