Corresponding Author

Masanori Ono

Department of Obstetrics and Gynecology, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Ishikawa, Japan

Department of Obstetrics and Gynecology, Tokyo Medical University, Shinjuku, Tokyo, Japan

Correspondence: Masanori Ono, Department of Obstetrics and Gynecology, Tokyo Medical University, 6-7-1 Nishishinjuku, Shinjuku, Tokyo 160-0023, Japan.

Email: masanori@tokyo-med.ac.jp