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Authors
Okubo, Aiko
Nakashima, Ayumu http://orcid.org/0000-0002-7838-1494
Doi, Shigehiro
Doi, Toshiki
Ueno, Toshinori
Maeda, Kazuya
Tamura, Ryo
Yamane, Kiminori
Masaki, Takao
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Article History
Received: 17 September 2019
Accepted: 17 December 2019
First Online: 19 February 2020
Compliance with ethical standards
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: All of the authors have declared that no conflicts of interest exist.
: This study was performed in accordance with the guidelines contained within the Declaration of Helsinki and the protocol was licensed by the hospital ethics committee of Hiroshima University Hospital (approval number: E-1411, registered on October 30, 2018).
: Written informed consent was not required because of the non-intervention and retrospective design. However, this study was approved by the hospital ethics committees of the Hiroshima University Hospital (approval number E-1411, registered October 30, 2018).
