1. School of Medicine, Ningbo University, Ningbo, China
2. State Key Laboratory for Diagnosis and Treatment of Infectious Disease, Key Laboratory of Infectious Diseases, the First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
3. Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, Zhejiang, China
4. Zhejiang Provincial Hospital, Hangzhou, Zhejiang, China