Ryu, Bikei http://orcid.org/0000-0003-0323-6628
Ishikawa, Tatsuya
Yamaguchi, Koji
Matsuoka, Go
Eguchi, Seiichiro
Kawamata, Takakazu
Article History
Received: 22 May 2018
Accepted: 19 July 2018
First Online: 31 July 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee (Tokyo Women’s Medical University) and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. For this type of study, formal consent is not required.
: Informed consent was obtained from all participants included in the study. All patients or relatives provided written informed consent for the surgical procedures and for the use of their data in the study.