Won Ik Seok, Kwang Byum Lee, Jong Min Lee, Um Gi Nam, Seong Jun Yoon, Soo Lan Choi, Seok Young Kim, Kwang Jun Kim, Jee Seong Lee, Soon Pyo Lee, Chan Yong Park, Yoo Deok Choi, Eui Don Lee
Korean J Obstet Gynecol. 2002;45(6):967-971. Published online June 1, 2002