1. Department of Neurology; Shandong Provincial Hospital affiliated to Shandong University; Jinan Shandong province PR China
2. Department of Neurology; Qilu Shihua Central Hospital; Zibo Shandong province PR China
3. Department of Neurosurgery; the Zhangqiu People's Hospital of Shandong; Jinan Shandong province PR China
4. Radiological Department; Jining No. 1 People's Hospital; Jining Shandong province PR China