1. Department of Neurology, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215004, P.R. China
2. School of Medical Imaging, Guizhou Medical University, Guiyang, Guizhou 550004, P.R. China
3. Department of Pathology, Guizhou Medical University, Guiyang, Guizhou 550004, P.R. China