Gyoung Hoon Lee, Yong Wook Kim, Kwang Beom Lee, Eun Jung Seo, Moon Sung Son, Hyun Gyoung Ahn, Eik Won Seok, Young Jin Choi, Gwang Jun Kim, Suk Young Kim, Byung Cheul Hwang, Yu Duk Choi, Sang Yong Kim, Seok Joon Sohn
Korean J Obstet Gynecol. 2001;44(10):1851-1856. Published online October 1, 2001