Feifei Cheng, Lu Zhao, Yuanyuan Wu, Tiantian Huang, Gangyi Yang, Zhanyu Zhang, Yijia Wu, Fang Jia, Jinlin Wu, Chen Chen, Dongfang Liu: (2016) Serum vascular endothelial growth factor B is elevated in women with polycystic ovary syndrome and can be decreased with metformin treatment