1. Department of Neurology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, China;
2. The People Hospital of Huaiyin Jinan, Jinan, China;
3. Department of Geriatrics, Department of Geriatric Neurology, Shandong Provincial Hospital, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, China