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Jung Ryul Lee, Jin Young Cha, Hun Young Cho, Yoo Kyung Lee, Min Soo Park, Yoo Seok Lee, Young Jeong Na, Soo Hyun Cho, Sam Hyun Cho, Sung Ro Chung, Youn Yeung Hwang
Korean J Obstet Gynecol. 2002;45(12):2189-2195. Published online December 1, 2002