1. Department of Neonatal, The Fourth Hospital of Harbin Medical University, Harbin
2. Public Affairs Management, Medical University of Tianjin, Tianjin, China
3. Rehabilitation Center, The Second Affiliated Hospital of Heilongjiang University of Chinese Medicine, Harbin, China
4. Children’s Rehabilitation Center, Heilongjiang Seamen General Hospital, Harbin, China
5. Department of Health Care, Harbin City Maternal and Child Health Care Family Planning Service Center, Harbin, China