[1] Hyogo Canc Ctr, Dept Gynecol Oncol, Akashi, Hyogo 6738558, Japan
[2] Saitama Med Univ, Int Med Ctr, Hidaka, Japan
[3] Hiroshima City Hosp, Dept Obstet & Gynecol, Hiroshima, Japan
[4] Saiseikai Suita Hosp, Dept Obstet & Gynecol, Suita, Osaka, Japan
[5] Tottori Univ, Dept Obstet & Gynecol, Yonago, Tottori, Japan