Hyunkyung Kim, Jin-Ju Lee, Yonghee Choi, Minkyoung Lee, Hye-Jin Hwang, Youn-Jee Chung, Hyun-Hee Cho, Mee-Ran Kim

Obstet Gynecol Sci.2018;61(3):425-429.   Published online 2018 April 9     DOI: http://dx.doi.org/10.5468/ogs.2018.61.3.425