1,510
Participants
Start Date
January 31, 2015
Primary Completion Date
March 31, 2016
Study Completion Date
March 31, 2016
Maternity and Child care of Huli District, Xiamen
Maternity and Child care of Xinmi City, Zhengzhou
Maternity and Child care of Zhongmu County, Zhengzhou
Maternity and Child care of Jiaxian County, Pingdingshan
Jun Zhang
OTHER