1. Department of Neurology, Qingdao Municipal Hospital, Dalian Medical University, Qingdao, PR China
2. College of Medicine and Pharmaceutics, Ocean University of China, Qingdao, PR China
3. Department of Neurology, Qingdao Municipal Hospital, School of Medicine, Qingdao University, Qingdao, PR China
4. Department of Neurology, Qingdao Municipal Hospital, Nanjing Medical University, Qingdao, PR China
5. Department of Geriatric, Qingdao Mental Health Center, Qingdao, PR China
6. Department of Neurology, Nanjing First Hospital, Nanjing Medical University, Nanjing, PR China