1. Department of Neurology, The Second Hospital of Shandong University, Jinan, Shandong 250033, P.R. China
2. Center of Evidence‑Based Medicine, The Second Hospital of Shandong University, Jinan, Shandong 250033, P.R. China
3. Department of Geriatrics, The Second Hospital of Shandong University, Jinan, Shandong 250033, P.R. China
4. Department of Radiology, The Second Hospital of Shandong University, Jinan, Shandong 250033, P.R. China
5. Institute of Medical Sciences, The Second Hospital of Shandong University, Jinan, Shandong 250033, P.R. China