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Authors
Yamada, Tsuyoshi
Shindo, Shigeo
Yoshii, Toshitaka
Ushio, Shuta
Kusano, Kazuo
Miyake, Norihiko
Arai, Yoshiyasu
Otani, Kazuyuki
Okawa, Atsushi
Nakai, Osamu
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Article History
Received: 5 August 2020
Accepted: 22 December 2020
First Online: 4 January 2021
Ethics approval and consent to participate
: The current retrospective study was approved by the review board of Tokyo Medical and Dental University (1777). Written consent was obtained from all patients who participated in the present study.
: Not applicable.
: The authors declare that they have no competing interests.
