Yun Sung Jo, Hyun Sun Ko, Dong Gyu Jang, Youn Jin Choi, Hyen Ju Son, Sa Jin Kim, Jong Chul Shin, Guisera Lee

Korean J Obstet Gynecol.2010;53(10):881-887.   Published online 2010 October 31     DOI: http://dx.doi.org/10.5468/kjog.2010.53.10.881