1 Department of Obstetrics and Gynecology, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan. zacky@gyne.med.osaka-u.ac.jp.
2 Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, University of Southern California, Los Angeles, CA, USA. zacky@gyne.med.osaka-u.ac.jp.
3 Department of Obstetrics and Gynecology, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan.
4 Department of Health Science, Osaka University Graduate School of Medicine, Osaka, Japan.