20,000
Participants
Start Date
July 9, 2018
Primary Completion Date
September 1, 2028
Study Completion Date
September 1, 2028
No treatment
No treatment
RECRUITING
The Children's Hospital of Zhejiang University School of Medicine, Hangzhou
Gansu Provincial Maternal and Child Health Care Hospital
OTHER
The Children's Hospital of Zhejiang University School of Medicine
OTHER
Dalian Children's Hospital
OTHER
Guangzhou Medical University
OTHER