1. National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, People’s Republic of China
2. Hangzhou Center for Disease Control and Prevention, Zhejiang, People’s Republic of China
3. The Sixth Medical Center of PLA General Hospital, Beijing, People’s Republic of China
4. The Third Medical Center, Chinese PLA (People’s Liberation Army) General Hospital, Beijing, People’s Republic of China