Department of Neurology, 202nd Hospital of PLA, Shenyang 110003, Liaoning Province, China;
Department of Neurology, Xuanwu Hospital of Capital Medical Col- lege, Beijing 100053, China;
Department of Neurology, 202nd Hospital of PLA, Shenyang 110003, Liaoning Province, China;
Department of Neurology, 202nd Hospital of PLA, Shenyang 110003, Liaoning Province, China;