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Authors
Yumoto, Masayuki
Hemmi, Natsuko
Sato, Naoki
Kawashima, Yudai
Arikawa, Koji
Ide, Keigo https://orcid.org/0000-0003-3586-6210
Hosokawa, Masahito https://orcid.org/0000-0002-7070-4690
Seo, Manabu
Takeyama, Haruko
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Article History
Received: 27 November 2019
Accepted: 10 April 2020
First Online: 28 April 2020
Competing interests
: Five authors declare the following competing interests: M. Yumoto, N. Hemmi, N. Sato, Y. Kawashima and M. Seo are employees of Ricoh Co., Ltd. and received salaries. K. Arikawa, K. Ide, M. Hosokawa and H. Takeyama declare no competing interests.
