1. General Ward II, Affiliated Municipal Central Hospital of Dalian Medical University, Dalian, Liaoning 116000, P.R. China
2. Department of Neurology, Nanjing Gaochun People's Hospital, Gaochun, Nanjing 210000, P.R. China
3. Surgical Intensive Care Unit, Dalian Municipal Central Hospital, Dalian, Liaoning 116000, P.R. China
4. Department of Neurology, The First People's Hospital of Shanghai Jiaotong University, Shanghai 200000, P.R. China
5. Department of Neurology, Affiliated Municipal Central Hospital of Dalian Medical University, Dalian, Liaoning 116000, P.R. China