1. Luoyang Maternal and Child Health Hospital
2. The Seventh Medical Center of Chinese PLA General Hospital
3. Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences
4. Shandong Provincial Hospital Affiliated to Shandong First Medical University
5. National Children's Regional Medical Center (Northwest)
6. The People`s Hospital of Guangxi Zhuang Autonomous Region
7. The First Affiliated Hospital of Xinxiang Medical University
8. Shandong Provincial Hospital