1. Department of Neurology, The Seventh Medical Centre of PLA General Hospital, Beijing, China;
2. Department of Neurology, NO 984 Hospital of the PLA, Beijing, China;
3. Department of Neurology, 2nd Affiliated Hospital of Shaanxi University of Chinese Medicine, Xianyang, China;
4. Affiliated Bayi Brain Hospital, the Seventh Medical Centre of PLA General Hospital, Beijing, China