Corresponding Author

Department of Obstetrics and Gynecology, Nara Prefecture General Medical Center

Correspondin author

Shinji Toyoda, Shichijyo-nishimachi, 2-897-5, Nara City, Nara Prefecture, 6308581, Japan, Phone: +81-742-46-6001, Fax: +81-742-46-6011,

E-mail: sjtoyoda@gmail.com