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Authors
Itoga, Masamichi
Tanaka, Hisashi
Taima, Kageaki
Ishioka, Yoshiko
Sakamoto, Hiroaki
Takanashi, Shingo
Kurose, Akira
Tasaka, Sadatomo http://orcid.org/0000-0003-4861-4143
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Article History
Received: 20 October 2020
Accepted: 8 January 2021
First Online: 15 January 2021
Ethics approval and consent to participate
: The study protocol was approved by the ethics committee of Hirosaki University Graduate School of Medicine, and written informed consent was waived because of the retrospective design.
: Not applicable.
: The authors declare that they have no competing interests.
