1. Department of Maternal, Child and Adolescent Health; School of Public Health; Anhui Medical University; Hefei China
2. Anhui Provincial Key Laboratory of Population Health and Aristogenics; Hefei China
3. Department of Health; Maternal and Child Health Care Center of Ma'anshan; Ma'anshan China
4. Department of Hygiene Analysis and Detection; School of Public Health; Anhui Medical University; Hefei China
5. Department of Obstetrics and Gynecology; Maternal and Child Health Care Center of Ma'anshan; Ma'anshan China
6. Department of Endocrinology; Anhui Geriatric Institute; The First Affiliated Hospital; Anhui Medical University; Hefei China