Yamaguchi, Yoshito http://orcid.org/0000-0001-5142-0302
Akagaki, Fuyuko
Nakamori, Aya
Sugiura, Toshihiro
Article History
Received: 9 September 2018
Accepted: 30 October 2018
First Online: 13 November 2018
Compliance with ethical standards
:
: The authors have declared that no conflict of interest exists.
: The study was approved by the ethics committee in the hospital.
: Informed consent was obtained from each participant. All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional review board and we confirmed the exemption of acquiring an approval number by the institutional review board based on the provisions about retrospective observational study. The study was conducted in accordance with the Declaration of Helsinki and its partial amendments.