1. Department of Neurology, Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou 563003, P.R. China
2. Department of Prevention and Health Care, Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou 563003, P.R. China
3. Department of Physiology, Zunyi Medical University, Zunyi, Guizhou 563003, P.R. China
4. Department of Neurology, Affiliated Hospital of Guizhou Medical University, Guiyang, Guizhou 550004, P.R. China