Maternal and Child Health Hospital of Guiyang City, Guiyangtou, Guizhou, China
Hebei Provincial People's Hospital, Shijiazhuang, Hebei, China
Maternal and Child Health Hospital of Anhui province, Hefei, Anhui, China
The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China
Guangzhou Women and Children's Medical Center, Guangzhou, Guangdong, China
Qilu Children's Hospital of Shandong University, Jinan, Shandong, China
Peking University Third Hospital, Beijing, China
People's Hospital of Peking University, Beijing, China
Peking University Third Hospital, Beijing, China
Children's Hospital Affiliated to Capital Institute of Pediatrics, Beijing, Beijing, China
Chinese Academy of Medical Sciences &Peking Union Medical College, Beijing, Beijing, China
Children's Hospital of Fudan University, Shanghai, Shanghai, China
Hunan Children's Hospital, Changsha, Hunan, China
Affiliated Hospital of Jiangnan University, Wuxi, Jiangsu, China
First Hospital of Jilin University, Changchun, Jilin, China
First People's Hospital of Wuhu, Wuhu, Anhui, China
Children's Hospital Affiliated to Zhejiang University, Hangzhou, Zhejiang, China