Department of Neurology, China-Japan Friendship Hospital, Beijing 100029, China;
Department of Neurology, Xi'an Central Hospital, Xi'an Jiaotong University School of Medicine, Xi'an, Shaanxi 710003, China;
Department of Neurology, Beijing Chao-Yang Hospital, Capital Medical University, Beijing 100020, China;
Department of Neurology, China-Japan Friendship Hospital, Beijing 100029, China;
Department of Neurology, China-Japan Friendship Hospital, Beijing 100029, China;