Kyung Chul Song, Ji Sung Lee, Seung Ug Lim, Gi Nam Eom, Cheol Gyu Kang, Yu Duk Choi, Sug Young Kim, Byoung Chul Hwang, Gwang Jun Kim, Eui Don Lee, Chan Yong Park, Jong Min Lee, Ji Young Kim, Sang Hwan Han, Jong Ho Kim
Korean J Obstet Gynecol. 2001;44(8):1407-1411. Published online August 1, 2001