1. Department of Infectious Diseases, Shaanxi Provincial People's Hospital and The Affiliated Hospital of Xi'an Medical University, Xi'an, Shaanxi 710068, P.R. China
2. The Third Department of Neurology, Shaanxi Provincial People's Hospital and The Affiliated Hospital of Xi'an Medical University, Xi'an, Shaanxi 710068, P.R. China
3. Department of Clinical Laboratory, Shaanxi Provincial People's Hospital and The Affiliated Hospital of Xi'an Medical University, Xi'an, Shaanxi 710068, P.R. China
4. Shaanxi Center for Models of Clinical Medicine in International Cooperation of Science and Technology, Shaanxi Provincial People's Hospital and The Affiliated Hospital of Xi'an Medical University, Xi'an, Shaanxi 710068, P.R. China