Kyeong A So, Yoon Kyung Oh, Hyo-Soon Hwang, Hye-Ri Hong, Geum Joon Cho, Min Jeong Oh, Jun Yong Hur

Korean J Obstet Gynecol.2010;53(9):778-786.   Published online 2010 September 30     DOI: http://dx.doi.org/10.5468/kjog.2010.53.9.778