1. Department of Neurosurgery, The Second Affiliated Hospital, Harbin Medical University, Harbin, Heilongjiang, China
2. Department of Interventional Radiology, The Second Affiliated Hospital, Harbin Medical University, Harbin, Heilongjiang, China
3. Department of Geriatrics, The Second Affiliated Hospital, Harbin Medical University, Harbin, Heilongjiang, China
4. International Physical Examination and Healthy Center, The Second Affiliated Hospital, Harbin Medical University, Harbin, Heilongjiang, China