1. Department of Endocrinology Key Laboratory of Endocrinology of Ministry of Health Peking Union Medical College HospitalChinese Academy of Medical Science and Peking Union Medical College Beijing China
2. Department of Obstetrics Haidian District Maternal and Child Health Care Hospital Beijing China
3. Department of Obstetrics Beijing Chaoyang District Maternal and Child Health Care Hospital Beijing China
4. Core Facility of Instrument Institute of Basic Medical Sciences Chinese Academy of Medical SciencesSchool of Basic MedicinePeking Union Medical College Beijing China
5. Department of Dean's Office Haidian District Maternal and Child Health Care Hospital Beijing China
6. Department of Laboratory Haidian District Maternal and Child Health Care Hospital Beijing China
7. Department of Clinical Laboratory Beijing Chaoyang District Maternal and Child Health Care Hospital Beijing China
8. National Center for Women and Children's HealthChina CDC Beijing China