[1] CHA Univ, CHA Gangnam Med Ctr, Obstet & Gynecol, Seoul, South Korea
[2] Konkuk Univ, Sch Med, Dept Obstet & Gynecol, Seoul, South Korea
[3] Sungkyunkwan Univ, Sch Med, Samsung Med Ctr, Obstet & Gynecol, Seoul, South Korea
[4] Seoul Natl Univ, Seoul Natl Univ Hosp, Coll Med, Obstet & Gynecol, Seoul, South Korea
[5] Univ Ulsan, Coll Med, Asan Med Ctr, Obstet & Gynecol, Seoul, South Korea
[6] Natl Canc Ctr, Ctr Uterine Canc, Canc Healthcare Res Branch, Goyang, South Korea
[7] Ctr Clin Trials Res Inst & Hosp, Goyang, South Korea
[8] Grad Sch Canc Sci & Policy, Dept Canc Control & Populat Hlth, Goyang, South Korea
[9] Seoul Natl Univ, SMG SNU Boramae Med Ctr, Coll Med, Dept Obstet & Gynecol, Seoul, South Korea
[10] Yonsei Univ, Coll Med, Dept Obstet & Gynecol, Seoul, South Korea
[11] Ajou Univ, Sch Med, Dept Obstet & Gynecol, Suwon, South Korea