1 | Maternity Department, W.F. Maternity and Child Care Hospital, Weicheng District, China |
2 | Neonatology Department, Weifang Medical University, Weicheng District, China |
3 | Pharmacy Department, W.F. Maternity and Child Care Hospital, Weifang, Weicheng District, China |
4 | Public Computer Center, Weifang Medical University, Weifang, Kuiwen District, China |