1. Key Laboratory of Medicinal Chemistry and Molecular Diagnosis (Ministry of Education), Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, P. R. China
2. Department of Immunology, School of Basic Medical Science, Hebei University, Baoding 071002, P. R. China
3. Department of Pathology, The First Central Hospital of Baoding, Baoding 071000, P. R. China