1. Department of Expanded Program on Immunization, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing, China
2. Medical Record Office, Children’s Hospital of Nanjing Medical University, Nanjing, China
3. Department of Expanded Program on Immunization, Nanjing Center for Disease Control and Prevention, Nanjing, China
4. Department of Expanded Program on Immunization, Gaogang Center for Disease Control and Prevention, Taizhou, China
5. Department of Rheumatology and Immunology, The Affiliated Suqian First People’s Hospital of Nanjing Medical University, Suqian, China