1. Departments of Pediatrics and Neonatology, Children’s Hospital of Fudan University, Shanghai, PR China,
2. Laboratory of Neonatal Medicine, National Commission of Health and Family Planning, Shanghai, PR China,
3. Department of Neonatology, Northwest Women and Children Hospital/Maternity Hospital of Shaanxi Province, Xi’an, Shaanxi, PR China,
4. Department of Neonatology, General Hospital of Ningxia Medical University, Yinchuan, Ningxia, PR China,
5. Department of Neonatology, Women and Children’s Hospital of Gansu Province, Lanzhou, Gansu, PR China,
6. Department of Neonatology, Women and Children’s Hospital of Qinghai Province, Xining, Qinghai, PR China,
7. Department of Neonatology, Kashi First Hospital of Xinjiang Uygur Autonomous Region, Kashi, Xinjiang, PR China,
8. Department of Neonatology, Maternal and Children Healthcare Hospital of Baoji City, Baoji, Shaanxi, PR China,
9. Department of Neonatology, People’s Hospital of Shaanxi Province, Xi’an, Shaanxi, PR China,
10. Department of Neonatology, Xi’an Municipal Children’s Hospital, Xi’an, Shaanxi, PR China,
11. Department of Neonatology, Women and Children’s Hospital of Shanxi Province, Taiyuan, Shanxi, PR China,
12. Department of Neonatology, People’s Hospital of Xinjiang Uygur Autonomous Region, Urumqi, Xinjiang, PR China,
13. Department of Neonatology, Women and Children’s Hospital of Yinchuan Municipality, Ningxia, PR China, and
14. Department of Neonatology, Women and Children’s Hospital of Inner Mongolia Autonomous Region, Hohhot, Inner Mongolia, PR China