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Authors
Mutsuzaki, Hirotaka
Kinugasa, Tomonori
Ikeda, Kotaro
Sakane, Masataka
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Article History
Received: 20 April 2018
Accepted: 18 December 2018
First Online: 29 December 2018
Ethics approval and consent to participate
: The ethics committee of Ichihara Hospital reviewed and approved this retrospective study (approval number 1101).
: Not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
