1. Department of Neurology, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, China
2. Department of Epidemiology, School of Public Health, Harbin Medical University, Harbin, Heilongjiang Province, China
3. Department of Laboratory Diagnosis, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, China
4. Department of Health Insurance Management, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, China