1. Yao Municipal Hospital Palliative Care Center Yao‐Shi Japan
2. Advanced Cancer Translational Research Institute (ACT) Showa University Tokyo Japan
3. P4 Statistics Co. Ltd. Setagayaku Japan
4. Department of Obstetrics and Gynecology Nihon University School of Medicine Itabashiku Japan
5. Department of Obstetrics and Gynecology Tokyo Medical University Tokyo Japan
6. Tokyo Medical University Ibaraki Medical Center Inashikigun Japan
7. University of the Ryukyus Okinawa Japan
8. St. Marianna University School of Medicine Hospital Kawasaki Japan
9. University of Fukui Hospital Fukui Japan
10. Niigata University Graduate School of Medical and Dental Sciences Niigata Japan