1. Department of Child Health Care, The Children’s Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou, China
2. Department of Child Health Care, Maternal and Child Health Hospital of Changxing, Huzhou, China
3. Department of Immunization Program, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China
4. Department of Pediatrics, Maternal and Child Healthcare Hospital Department of Shangyu, Shaoxing, China
5. Department of Immunization Program, Center for Disease Control and Prevention of Shangyu, Shaoxing, China