1. Department of Pathogenic Biology, Shandong University School of Medicine, Jinan, Shandong, China
2. Microbiological Laboratory, The Affiliated Hospital of School of Medicine of Ningbo University, Ningbo, Zhejiang, China
3. Department of Biochemistry and Molecular Biology, Shandong University School of Medicine, Jinan, Shandong, China
4. Department of Pathology, Shandong University School of Medicine, Jinan, Shandong, China