Sichuan Center for Disease Control and Prevention, Chendu, Sichuan, China
Liuzhou Center for Disease Control and Prevention, Liuzhou, Guangxi, China
Sichuan Center for Disease Control and Prevention, Chendu, Sichuan, China
Hunan Provincial Center for Disease Control and Prevention, Xiangtan, Changsha, China
The Third People's Hospital Of Shenzhen, Shenzhen, Guangdong, China
Hunan Provincial Center for Disease Control and Prevention, Hunan, Changsha, China
The Second Affiliated Hospital of Chongqing Medical University, Chongqing, Chongqing, China
Wuhan Infectious Disease Hospital, Wuhan, Hubei, China
Wuhan Medical Treatment Center, Wuhan, Hubei, China
Beijing Children's Hospital, Beijing, China
Shanghai Public Health Clinical Center, Shanghai, China
Shanghai Public Health clinical Center, Shanghai, Shanghai, China