June Seek Choi, Jae Hyug Yang, Hyun Mee Ryu, Moon Young Kim, Jung Yeol Han, Hyun Kyung Ahn, Sang Hee Jung, Kyu Hong Choi, Jee Young Lee, Soo Young Lee, Jeong Yeon Cho, Young Ho Lee
Korean J Obstet Gynecol. 2002;45(9):1497-1504. Published online September 1, 2002