Tahara, Junko
Shimizu, Kyoko http://orcid.org/0000-0003-1221-0315
Otsuka, Nao
Akao, Junichi
Takayama, Yukiko
Tokushige, Katsutoshi
Article History
Received: 26 April 2018
Accepted: 25 May 2018
First Online: 30 May 2018
Compliance with ethical standards
:
: All authors declare 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 and with the 1964 Helsinki declaration and its later amendment or comparable ethical standards. For this type of study, formal consent is not required.
: Informed consent was not obtained, because our study was a retrospective analysis.