Sugawara, Kotaro http://orcid.org/0000-0002-3272-1748
Yoshimura, Shuntaro
Yagi, Koichi
Nishida, Masato
Aikou, Susumu
Yamagata, Yukinori
Mori, Kazuhiko
Yamashita, Hiroharu
Seto, Yasuyuki
Article History
Received: 20 March 2019
Accepted: 12 June 2019
First Online: 8 July 2019
Compliance with ethical standards
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: The contributions of the authors to this study are as follows: Kotaro Sugawara, Shuntaro Yoshimura, and Yasuyuki Seto are the authors mainly responsible for the study’s conception and design, acquisition of data, and analysis and interpretation of data. Koichi Yagi, Masato Nishida, Susumu Aikou, Yukinori Yamagata, Kazuhiko Mori and Hiroharu Yamashita contributed mainly to the drafting of the article and to revising it critically for important intellectual content. Drs. Kotaro Sugawara, Shuntaro Yoshimura, Koichi Yagi, Masato Nishida, Susumu Aikou, Yukinori Yamagata, Kazuhiko Mori, Hiroharu Yamashita, and Yasuyuki Seto have no conflicts of interest or financial ties to disclose.