Chen Ya-Fang, Ismail Hamizah, Chou Min-Min, Lee Fang-Yi, Lee Jen-Hueih, Ho Esther Shih-Chu
Department of Obstetrics and Gynecology, Chung Shan Medical University, Taichung, Taiwan.
Taiwan J Obstet Gynecol. 2012 Sep;51(3):440-2. doi: 10.1016/j.tjog.2012.07.023.