1. Chinese National Influenza Center, National Institute for Viral Disease Control and Prevention, Collaboration Innovation Center for Diagnosis and Treatment of Infectious Diseases, Chinese Center for Disease Control and Prevention, Key Laboratory for Medical Virology National Health Commission Beijing P.R. China
2. Ningbo Municipal Center for Disease Prevention and Control Ningbo P.R. China
3. Laboratory of Microbiology Gansu Provincial Center for Disease Control and Prevention Lanzhou P.R. China
4. Yuyao Municipal Center for Disease Prevention and Control Ningbo P.R. China
5. Lanjiang Street Community Health Service Center Ningbo P.R. China
6. Yangming Street Community Health Service Center Ningbo P.R. China