1. Jiangsu Provincial Center for Disease Control and Prevention, Nanjing, China
2. Jiangsu Provincial Key Laboratory of Critical Care Medicine, Nanjing, China
3. Zhenjiang Center for Disease Control and Prevention, Zhenjiang, China
4. Jurong Hospital Affiliated to Jiangsu University, Zhenjiang, China
5. China Chinese Center for Disease Control and Prevention (China CDC), Beijing, China
6. Washington University in St. Louis, St. Louis, MO