Kyung Ah Jeong, Ki Hyun Park, Hyun Sook Yoon, Jeong Mi Yoon, Woo Hyun Sohn, Sang Wook Bai, Young Tae Kim, Byung Seok Lee, Kyung Seo, Sei Kwang Kim, Dong Jae Cho, Chan Ho Song
Korean J Obstet Gynecol. 2004;47(2):307-312. Published online February 1, 2004