[1]Univ Ulsan, Coll Med, Asan Med Ctr, Dept Obstet & Gynecol, Seoul 138736, South Korea.
[2]Univ Hong Kong, Queen Mary Hosp, Dept Obstet & Gynecol, Hong Kong, Hong Kong, Peoples R China.
[3]Sungkyunkwan Univ, Sch Med, Samsung Med Ctr, Dept Radiat Oncol, Seoul, South Korea.
[4]Tsinghua Univ, Obstet & Gynecol Ctr, Sch Med, Beijing 100084, Peoples R China.
[5]Fudan Univ, Shanghai Canc Ctr, Dept Gynecol Oncol, Shanghai 200433, Peoples R China.
[6]Ewha Womans Univ, Sch Med, Dept Obstet & Gynecol, Seoul, South Korea.
[7]Seoul Natl Univ, Coll Med, Dept Obstet & Gynecol, Seoul, South Korea.
[8]Ajou Univ, Sch Med, Gynecol Canc Ctr, Dept Obstet & Gynecol, Suwon 441749, South Korea.
[9]Res Inst & Hosp, Natl Canc Ctr, Ctr Uterine Canc, Goyang, South Korea.
[10]Korea Canc Ctr Hosp, Korea Inst Radiol & Med Sci, Dept Obstet & Gynecol, Seoul, South Korea.
[11]Yonsei Univ, Gangnam Severance Hosp, Coll Med, Dept Obstet & Gynecol, Seoul 120749, South Korea.
[12]Keimyung Univ, Dept Obstet & Gynecol, Daegu, South Korea.
[13]Catholic Univ Korea, Coll Med, Dept Obstet & Gynecol, Seoul, South Korea.
[14]Sungkyunkwan Univ, Sch Med, Samsung Med Ctr, Dept Obstet & Gynecol, Seoul, South Korea.
[15]Penang Med Coll, Gleneagles Penang, George Town, Penang, Malaysia.
[16]Mahidol Univ, Ramathibodi Hosp, Fac Med, Dept Obstet Gynecol, Bangkok 10700, Thailand.
[17]Kyoto Univ, Grad Sch Med, Dept Gynecol & Obstet, Kyoto, Japan.
[18]Korea Univ, Med Ctr, Dept Obstet & Gynecol, Seoul, South Korea.
[19]Mackay Mem Hosp, Mackay Med Coll, Dept Obstet & Gynecol, Taipei, Taiwan.
[20]Mackay Jr Coll Med Nursing & Management, Dept Nursing, Taipei, Taiwan.