1. The 2nd Ward of Microinvasive Neurosurgery, The Fourth Affiliated Hospital of Harbin Medical University, Harbin 150000, China
2. Department of Competent Nursing, The Fourth Affiliated Hospital of Harbin Medical University, Harbin 150000, China
3. Department of Elderly Ward, The Fourth Affiliated Hospital of Harbin Medical University, Harbin 150000, China