Yamaguchi, Satoshi http://orcid.org/0000-0002-2687-2830
Nakamura, Kyoichi
Kobayashi, Osamu
Takahashi, Yukio
Sato, Kenji
Shimabukuro, Michio
Article History
Received: 28 July 2018
Accepted: 24 September 2018
First Online: 8 November 2018
Ethics approval and consent to participate
: The present study was approved by the local ethical committee at Kameda Medical Center. The informed consent was waived, because of the nature of the study.
: The local ethical committee approved the publication of data from this study. The documented informed consent was waived.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.