1. Department of Neurology, The Fourth People’s Hospital of Shenyang, Shenyang, China;
2. Department of Neurology, Lingshui Li Autonomous County People's Hospital, Lingshui, China;
3. Department of Neurology, The First Hospital of China Medical University, Shenyang, China;
4. Department of Geriatrics, Shengjing Hospital of China Medical University, Shenyang, China