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Authors
Kojima, Naoki https://orcid.org/0000-0001-6963-3824
Kuno, Ikumi
Ushigusa, Takeshi
Kato, Tomoyasu
Yoshida, Hiroshi https://orcid.org/0000-0002-7569-7813
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Article History
Received: 25 December 2019
Revised: 28 January 2020
Accepted: 13 February 2020
First Online: 26 February 2020
Compliance with ethical standards
: The present study has been approved by the institutional review board of the National Cancer Center Japan and was conducted in accordance with the Declaration of Helsinki.
: The authors declare that they have no conflict of interest.
