[1] Korea Natl Inst Hlth, Korea Dis Control & Prevent Agcy, Div Populat Res, Dept Precis Med, Cheongju, South Korea
[2] Minist Hlth & Welf, Bur Adv Hlth Technol Policy, Div Healthcare Technol Dev, Sejong, South Korea
[3] CHA Univ Sch Med, Dept Obstet & Gynecol, CHA Bundang Med Ctr, Seongnam, South Korea
[4] Ajou Univ, Sch Med, Dept Obstet & Gyneco, Suwon, South Korea
[5] Univ Ulsan, Sch Med, Asan Med Ctr, Dept Obstet & Gynecol, Seoul, South Korea
[6] CHA Univ Sch Med, CHA Gangnam Med Ctr, Department Obstet & Gynecol, Seoul, South Korea
[7] Korea Natl Inst Hlth, Korea Dis Control & Prevent Agcy, Dept Precis Med, Cheongju, South Korea