1. School of Medicine, Ningbo University, Ningbo, Zhejiang, China
2. The Office of the National Science and Technology Project, Zhejiang Provincial Centers for Disease Control and Prevention, Hangzhou, Zhejiang, China
3. Medical record room, Ningbo Medical Center Lihuili Eastern Hospital, Ningbo, Zhejiang, China
4. Medical record room, Zhejiang Provincial Hospital, Hangzhou, Zhejiang, China
5. 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, Zhejiang, China