1. The First Affiliated Hospital of Hebei North University, Zhangjiakou, China
2. Department of Aerospace Medicine, Fourth Military Medical University, Xi’an, China
3. Hebei Maternity Hospital, Shijiazhuang, China
4. Life Science Research Center, Hebei North University, Zhangjiakou, China
5. School of Basci Med, Fouth Military Medical University, Xi’an, China