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