1. Laboratory Medicine Center; The Second Affiliated Hospital of Nanjing Medical University; Nanjing China
2. Key Lab of Enteric Pathogenic Microbiology, Ministry of Health, Department of Acute Infectious Disease Control and Prevention; Jiangsu Provincial Center for Disease Control and Prevention; Nanjing China
3. Department of Acute Infectious Disease Control and Prevention; Suzhou Center for Disease Control and Prevention; Suzhou China