1. Department of Neurosurgery, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, P.R. China
2. Department of Neurology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, P.R. China
3. Department of Neurosurgery, Tongren Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200336, P.R. China
4. Department of Neurosurgery, Huashan Hospital, Fudan University, Shanghai 200040, P.R. China
5. Department of Emergency, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Yangpu, Shanghai 200092, P.R. China