1. Department of Neurology; Second Affiliated Hospital of Harbin Medical University; Harbin Heilongjiang China
2. Department of Neurology; Haidian Hospital; Beijing 100080 China
3. Department of Geriatrics; Second Affiliated Hospital of Harbin Medical University; Harbin Heilongjiang China
4. Department of Pharmacy; Second Affiliated Hospital of Harbin Medical University; Harbin Heilongjiang China