1. Department of Geriatrics, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
2. Department of Orthopedic Surgery, The Fourth Affiliated Hospital of Harbin Medical University, Harbin, China
3. Department of Nursing, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
4. Institute of Clinical Pharmacology, The Second Affiliated Hospital of Harbin Medical University, Harbin, China