Terada, Naoki
Kamoto, Toshiyuki
Tsukino, Hiromasa
Mukai, Shoichiro
Akamatsu, Shusuke
Inoue, Takahiro
Ogawa, Osamu
Narita, Shintaro
Habuchi, Tomonori
Yamashita, Shinichi
Mitsuzuka, Koji
Arai, Yoichi
Kandori, Shuya
Kojima, Takahiro
Nishiyama, Hiroyuki
Kawamura, Yoshiaki
Shimizu, Yuki
Terachi, Toshiro
Sugi, Motohiko
Kinoshita, Hidefumi
Matsuda, Tadashi
Yamada, Yusuke
Yamamoto, Shingo
Hirama, Hiromi
Sugimoto, Mikio
Kakehi, Yoshiyuki
Sakurai, Toshihiko
Tsuchiya, Norihiko
Article History
Received: 19 October 2018
Accepted: 1 February 2019
First Online: 15 February 2019
Ethics approval and consent to participate
: This study was approved by the Yamagata University ethics committee and by the institutional review board of each university. Written informed consent was not necessarily required in this observational noninvasive retrospective study according to the local guidelines (the Ethical Guidelines for Medical and Health Research Involving Human Subjects by the Ministry of Health, Labour and Welfare of Japan).
: This manuscript contains no individual person’s data.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.