1. Department of Neurology, Daping Hospital, Third Military Medical University, Chongqing, China
2. Department of Geriatrics, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
3. Department of Neurology, Southwest Hospital, Third Military Medical University, Chongqing, China
4. Department of Neurology, Chongqing General Hospital, Chongqing, China
5. Department of Microbiology, Third Military Medical University, Chongqing, China
6. Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China