6,000
Participants
Start Date
October 31, 2011
Study Completion Date
August 31, 2014
Children Hospital of Fudan University, Shanghai
Ningbo Women & Children's Hospital
OTHER
Changzhou Maternal and Child Care Hospital
OTHER
Maternal and Child Health Hospital of Taian
UNKNOWN
Maternal and Child Health Hospital of Wuxi
UNKNOWN
Kunshan City Maternal and Child Health
OTHER
The First Affiliated Hospital of Xiamen University
OTHER
Maternal and Child Health Hospital, Jiading District
OTHER
Minhang Maternal and Children Health Care Hospital
OTHER
Children's Hospital of Fudan University
OTHER