[1] Incheon St. Mary’s Hospital,Department of Obstetrics and Gynecology
[2] College of Medicine,Department of Obstetrics and Gynecology, College of Medicine
[3] The Catholic University of Korea,Department of Obstetrics and Gynecology
[4] The Catholic University of Korea,Department of Obstetrics and Gynecology
[5] Seoul St. Mary’s Hospital,Department of Obstetrics and Gynecology
[6] College of Medicine,Department of Obstetrics and Gynecology
[7] The Catholic University of Korea,Department of Obstetrics and Gynecology
[8] Eunpyeong St. Mary’s Hospital,Department of Obstetrics and Gynecology
[9] College of Medicine,undefined
[10] The Catholic University of Korea,undefined
[11] Bucheon St. Mary’s Hospital,undefined
[12] College of Medicine,undefined
[13] The Catholic University of Korea,undefined
[14] Uijeongbu St. Mary’s Hospital,undefined
[15] College of Medicine,undefined
[16] The Catholic University of Korea,undefined
[17] St. Vincent’s Hospital,undefined
[18] College of Medicine,undefined
[19] The Catholic University of Korea,undefined
[20] Yeouido St. Mary’s Hospital,undefined
[21] College of Medine,undefined
[22] The Catholic University of Korea,undefined