1. Department of Neurology, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, P.R. China
2. Department of Neurology, The Second People's Hospital of Hefei, Hefei, Anhui 230011, P.R. China
3. Institute of Clinical Immunology, Jiangsu Key Laboratory of Clinical Immunology, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006 P.R. China