Choroidal Vascularity Index as a Biomarker for Visual Response to Antivascular Endothelial Growth Factor Treatment in Diabetic Macular Edema oleh Ningxin Dou, Shanshan Yu, Ching-Kit Tsui, Boyu Yang, Jianqiang Lin, Xi Lu, Yue Xu, Benjuan Wu, Jinfeng Zhao, Xiaoling Liang