1. Department of Epidemiology and Health Statistics School of Public Health Anhui Medical University Hefei China
2. Department of Child Health Care, Maternal and Child Health Care Hospital of Anhui Province Affiliated Maternal and Child Health Care Hospital of Anhui Medical University Hefei China
3. Department of Neonatology Children's Hospital of Anhui Medical University Hefei China
4. The Second Affiliated Hospital of Anhui Medical University Hefei China
5. Center for Evidence‐Based Practice Anhui Medical University Hefei China