2,313
Participants
Start Date
July 26, 2019
Primary Completion Date
December 31, 2020
Study Completion Date
December 31, 2021
Guangzhou Women and Children's Medical Center, Guangzhou
Tianhe District Maternal and Child Health Hospital, Guangzhou
Longhua District Maternal and Child Health Hospital, Haikou
Qiongshan District Maternal and Child Health Hospital, Haikou
Guangzhou Women and Children's Medical Center
OTHER