[1] Natl Hosp Org Shikoku Canc Ctr, Dept Gynecol Oncol, Shizuoka, Japan
[2] Kurume Univ, Dept Obstet & Gynecol, Sch Med, Kurume, Fukuoka, Japan
[3] Iwate Med Univ, Dept Obstet & Gynecol, Sch Med, Morioka, Iwate, Japan
[4] Mie Univ Hosp, Dept Obstet & Gynecol, Tsu, Mie, Japan
[5] Jichi Med Univ, Dept Obstet & Gynecol, Shimotsuke, Tochigi, Japan
[6] Oita Univ, Dept Obstet & Gynecol, Fac Med, Yufu, Japan
[7] Okinawa Chubu Hosp, Dept Obstet & Gynecol, Uruma, Okinawa, Japan
[8] Nara Prefecture Gen Med Ctr, Dept Obstet & Gynecol, Nara, Japan
[9] Japanese Red Cross Shizuoka Hosp, Dept Obstet & Gynecol, Shizuoka, Japan
[10] Nagoya City Univ Hosp, Dept Obstet & Gynecol, Nagoya, Aichi, Japan
[11] Nara Med Univ, Dept Obstet & Gynecol, Kashihara, Nara, Japan
[12] Hyogo Coll Med, Dept Obstet & Gynecol, Nishinomiya, Hyogo, Japan
[13] Kyoto Prefectural Univ Med, Grad Sch Med Sci, Dept Obstet & Gynecol, Kyoto, Japan
[14] Kansai Rosai Hosp, Dept Obstet & Gynecol, Amagasaki, Hyogo, Japan