Fang, Yuanjian; Xu, Shenbin; Lu, Jianan; Wu, Haijian; Zheng, Jingwei; Lenahan, Cameron; Cao, Yang; Chen, Sheng; Wang, Zefeng; Zhang, Jianmin.(2020). Validation and Comparison of Aneurysmal Subarachnoid Hemorrhage Grading Scales in Angiogram-Negative Subarachnoid Hemorrhage Patients. Department of Neurosurgery.