1. Department of Neurology, Fu Xing Hospital, Capital Medical University, Beijing, P. R. China
2. Department of Neurology, Beijing Friendship Hospital, Capital Medical University, Beijing, P. R. China
3. Capital Medical University, Beijing, P. R. China.
4. Department of Neurology and Epilepsy Center, Beijing Sanbo Brain Hospital, Capital Medical University, Beijing, P. R. China
5. Epilepsy Center, Guangdong 999 Brain Hospital, Guangzhou, Guangdong, P.R. China
6. Department of Neurosurgery (Ward I) and Epilepsy Center, Capital Medical University, Beijing, P. R. China