[1] Tokyo Med Univ, Dept Obstet & Gynecol, Shinjuku Ku, 6-7-1 Nishi Shinjuku, Tokyo 1600023, Japan
[2] Natl Ctr Child Hlth & Dev, Childrens Canc Ctr, Setagaya Ku, 2-10-1 Okura, Tokyo 1578535, Japan
[3] Natl Canc Ctr, Div Gastrointestinal Med Oncol, Chuo Ku, 5-1-1 Tsukiji, Tokyo 1040045, Japan
[4] Okayama Univ Hosp, Div Blood Transfus, Kita Ku, 2-5-1 Shikata Cho, Okayama, Okayama 7008558, Japan
[5] Univ Tokyo, Grad Sch Med, Dept Allergy & Rheumatol, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, Japan
[6] Gifu Univ, Grad Sch Med, Dept Obstet & Gynecol, 1-1 Yanagido, Gifu, Gifu 5011194, Japan
[7] Univ Tokyo, Grad Sch Med, Dept Obstet & Gynecol, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, Japan
[8] Jichi Med Univ, Dept Med, Div Hematol, 3311-1 Yakushiji, Shimotsuke, Tochigi 3290498, Japan
[9] Natl Canc Ctr, Dept Musculoskeletal Oncol & Rehabil Med, Chuo Ku, 5-1-1 Tsukiji, Tokyo 1040045, Japan
[10] Kyoto Prefectural Univ Med, Dept Pediat, Kamigyo Ku, 465 Kajii Cho, Kyoto, Kyoto 6028566, Japan
[11] Natl Ctr Child Hlth & Dev, Ctr Maternal Fetal Neonatal & Reprod Med, Div Maternal Med, Setagaya Ku, 2-10-1 Okura, Tokyo 1578535, Japan
[12] Keio Univ, Sch Med, Dept Orthoped Surg, Shinjuku Ku, 35 Shinanomachi, Tokyo 1608582, Japan
[13] Univ Tsukuba, Fac Med, Dept Urol, 1-1-1 Tennodai, Tsukuba, Ibaraki 3058577, Japan
[14] Univ Tsukuba, Grad Sch Comprehens Human Sci, 1-1-1 Tennodai, Tsukuba, Ibaraki 3058577, Japan
[15] Natl Ctr Global Hlth & Med Hosp, Dept Oncol, Shinjuku Ku, 1-21-1 Toyama, Tokyo 1628655, Japan
[16] Hiroshima Univ Hosp, Dept Clin Oncol, Minami Ku, 1-2-3 Kasumi, Hiroshima, Hiroshima 7348551, Japan
[17] Hiroshima Univ Hosp, Neurooncol Program, Minami Ku, 1-2-3 Kasumi, Hiroshima, Hiroshima 7348551, Japan
[18] Saitama Med Univ, Saitama Med Ctr, Dept Obstet & Gynecol, 1981 Kamoda, Kawagoe, Saitama 3508550, Japan
[19] St Marianna Univ, Sch Med, Dept Obstet & Gynecol, Miyamae Ku, 2-16-1 Sugao, Kawasaki, Kanagawa 2168511, Japan