1. Public Health Emergency Center, Chinese Center for Disease Control and Prevention, Beijing
2. Fujian Center for Disease Control and Prevention, Fuzhou
3. Guangdong Center for Disease Control and Prevention, Guangzhou
4. Zhejiang Center for Disease Control and Prevention, Hangzhou, China
5. United States Centers for Disease Control and Prevention, Atlanta, Georgia
6. Jiangsu Center for Disease Control and Prevention, Nanjing
7. Jiangxi Center for Disease Control and Prevention, Nanchang
8. Hunan Center for Disease Control and Prevention, Changsha
9. Shanghai Center for Disease Control and Prevention
10. Chinese Field Epidemiology Training Program, Chinese Center for Disease Control and Prevention, Beijing
11. National Influenza Center, Chinese Center for Disease Control and Prevention, Beijing
12. Chinese Center for Disease Control and Prevention, Beijing, China