[1] Univ Southern Calif, Dept Obstet & Gynecol, Div Gynecol Oncol, Los Angeles, CA 90089 USA
[2] Univ Southern Calif, Norris Comprehens Canc Ctr, Los Angeles, CA 90033 USA
[3] Tottori Univ, Dept Obstet & Gynecol, Tottori 6838504, Japan
[4] Tohoku Univ, Dept Obstet & Gynecol, Sendai, Miyagi 9808577, Japan
[5] Hyogo Canc Ctr, Dept Gynecol Oncol, Akashi, Hyogo 6730021, Japan
[6] Matsue City Hosp, Matsue, Shimane 6908509, Japan
[7] Mie Univ Hosp, Dept Obstet & Gynecol, Tsu, Mie 5148507, Japan
[8] Hiroshima City Hiroshima Citizens Hosp, Dept Obstet & Gynecol, Hiroshima 7308518, Japan
[9] Univ Tokyo, Grad Sch Med, Dept Obstet & Gynecol, Tokyo 1138654, Japan
[10] Nihon Univ, Fac Med, Dept Obstet & Gynecol, Sch Med, Tokyo 1738610, Japan
[11] Tokai Univ, Dept Obstet & Gynecol, Isehara, Kanagawa 2591193, Japan
[12] Iwate Med Univ, Dept Obstet & Gynecol, Morioka, Iwate 0200023, Japan