Chang Up Son, Kyoung Hwa Kang, Woo Suk Na, Min Choung, Ji Hoon Ryu, Byoung Kang Min, Ki Hwan Kim, Byung Kwan Lee, Jeong Hoon Rho, Kwan Young Oh, Yoon Seok Yang, In Taek Hwang, Joon Suk Park
Korean J Obstet Gynecol. 2006;49(7):1559-1566. Published online July 1, 2006