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Authors
Ohmura, Kazumasa
Kato, Masaru https://orcid.org/0000-0002-2023-6585
Watanabe, Toshiyuki
Oku, Kenji
Bohgaki, Toshiyuki
Horita, Tetsuya
Yasuda, Shinsuke
Ito, Yoichi M.
Sato, Norihiro
Atsumi, Tatsuya
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Article History
Received: 1 February 2018
Accepted: 4 April 2018
First Online: 17 April 2018
Ethics approval and consent to participate
: This study was approved by the local ethical committee of Hokkaido University (approval number 015–0459).
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
