Hirata, Kimiko
Goto, Sakae
Izumi, Yoko
Taguchi, Misato
Hayashi, Ayano
Fujioka, Misono
Ishiko, Akiko
Nakanishi, Keiko
Kimura, Fuminori
Murakami, Takashi
Article History
Received: 23 July 2019
Accepted: 17 April 2020
First Online: 15 May 2020
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 (Ethics Committee of the Japan Society of Obstetrics and Gynecology; No. 148) and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained from all individual participants included in the study.