Byoung Sun Yoon, Yong Jung Song, Sang Hee Kim, Mu Sam Kang, Sung Jin Hong, Suck Chul Choi, Sang Young Ryu, Byoung Gie Kim, Sang Yoon Park, Eui Don Lee, Kyung Hee Lee, Jin Haeng Chung
Korean J Obstet Gynecol. 2001;44(12):2307-2311. Published online December 1, 2001