Soo-Young Oh, Joon Seok Hong, Hyun-Joo Seol, Han Sung Hwang, Hyun Soo Park, Kunwoo Kim, Hyun Sun Ko, Dong-Wook Kwak, Moon Young Kim, Mi Hye Park, Min Jeong Oh, Joong Shin Park, Sa Jin Kim,

Obstet Gynecol Sci.2015;58(1):1-9.   Published online 2015 January 16     DOI: http://dx.doi.org/10.5468/ogs.2015.58.1.1