Chul Kwon Lim, Hee Jin Kim, Joon Sook Pack, Joong Gyu Ha, Yun Seok Yang, Hye Kyung Lee, Seung Hyun Kim

Obstet Gynecol Sci.2018;61(6):702-706.   Published online 2018 October 11     DOI: http://dx.doi.org/10.5468/ogs.2018.61.6.702