1. Guangzhou Center for Disease Control and Prevention, Guangzhou, China (L.L., X.L., Q.J., F.L., H.B., J.L., W.Z., Z.H., Y.M.)
2. School of Public Health, Southern Medical University, Guangzhou, China (D.L., X.W., J.Z., Z.L., W.S., Z.W., X.Z., Q.H., P.C., H.L., X.C., M.C., P.Y., X.Y., C.M.)
3. State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital College of Medicine, Zhejiang University, Hangzhou, China (S.Y.)
4. Clinical Data Center and Guangdong Provincial Children's Medical Research Center, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China (J.T.)