Jung Myung Kim, Na Yeon Kim, Ji Yun Kim, Si Yeon You, Kwan Young Oh, Won Il Park, Kyung A Lee, Young Ju Kim, Sun Hee Chun, Mi Hye Park

Korean J Obstet Gynecol.2010;53(6):489-496.   Published online 2010 June 30     DOI: http://dx.doi.org/10.5468/kjog.2010.53.6.489