Sung Jong Lee, Youn Jee Chung, Sung Hak Lee, Youn Jin Choi, Narinay Kim, Hyun Joo Son, Joo Hee Yoon

Korean J Obstet Gynecol.2010;53(9):851-855.   Published online 2010 September 30     DOI: http://dx.doi.org/10.5468/kjog.2010.53.9.851