Korai, Takahiro
Kouchi, Katsunori
Takenouchi, Ayako
Matsuoka, Aki
Yabe, Kiyoaki
Nakata, Chikako
Article History
Accepted: 31 July 2018
First Online: 14 August 2018
Compliance with ethical standards
:
: All procedures performed in this study were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. For this type of study, formal consent was not required. This retrospective study was approved by the ethics committee of the Tokyo Women’s Medical University.
: The authors declare that they have no conflicts of interest.