1. Key Lab of Enteric Pathogenic Microbiology; Ministry of Health; Jiangsu Provincial Center for Disease Control and Prevention; Nanjing China
2. Suzhou Center for Disease Control and Prevention; Suzhou China
3. Soochow University Affiliated Children's Hospital; Suzhou China
4. Institute for Viral Diseases Control and Prevention; Chinese Center for Disease Control and Prevention; Beijing China
5. The Second Affiliated Hospital of Nanjing Medical University; Nanjing China