1. Department of Neurology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, People's Republic of China
2. Department of Neurology, Institute of Clinical Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, People's Republic of China
3. Department of Medicine, Shangqiu Medical School, Shangqiu 476000, Henan Province, People's Republic of China
4. Department of Clinical Medicine, Shaoyang Medical College, Shaoyang 422000, Hunan Province, People's Republic of China