1. Department of Infectious Diseases, Children’s Hospital of Fudan University, National Children’s Medical Center, Shanghai, China
2. Statistics and Data Management Center, Children’s Hospital of Fudan University, National Children’s Medical Center, Shanghai, China
3. Department of Virology, Children’s Hospital of Fudan University, National Children’s Medical Center, Shanghai, China
4. Department of Clinical Microbiology Laboratory, Children’s Hospital of Fudan University, National Children’s Medical Center, Shanghai, China
5. Department of Respiratory, Children’s Hospital of Fudan University, National Children’s Medical Center, Shanghai, China
6. Clinical Trial Unit, Children’s Hospital of Fudan University, National Children’s Medical Center, Shanghai, China
7. National Institute for Viral Disease Control and Prevention, China CDC, Beijing, China