BPG is committed to discovery and dissemination of knowledge
Open-Access Journal
Retrospective Cohort Study
Min Yang, Xiao-Xia An, Hui-Juan Wang, Ji-Mei Wang 
World J Obstet Gynecol 6(2):8-15. Published online May 10, 2017. doi: 10.5317/wjog.v6.i2.8
Write to the Help Desk