1. Second Department of Neurology, People's Hospital Affiliated to Shandong First Medical University, Jinan 271199, Shandong Province, China
2. Second Department of Rehabilitation Medicine, People's Hospital Affiliated to Shandong First Medical University, Jinan 271199, Shandong Province, China
3. Department of Science Teaching, People's Hospital Affiliated to Shandong First Medical University, Jinan 271199, Shandong Province, China