Chen X H, Kong X C, Jia R U, Liu D Z, Qiu X H
Second Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, China.
Fourth Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, China.
Eur J Obstet Gynecol Reprod Biol. 2014 Jun;177:154-5. doi: 10.1016/j.ejogrb.2014.03.031. Epub 2014 Apr 12.