Seok Hyun Kim, Soon Sup Shim, Byung Chul Jee, Sung Mi Choi, Hee Sun Kim, Buom Yong Ryu, Sun Kyung Oh, Chang Suk Suh, Young Min Choi, Kwang Bum Bai, Jung Gu Kim, Shin Yong Moon, Jin Yong Lee
Korean J Obstet Gynecol. 2001;44(3):492-500. Published online March 1, 2001