1. Neonatal Intensive Care Unit, Zhengzhou Key Laboratory of Newborn Disease Research Children’s Hospital Affiliated to Zhengzhou University Zhengzhou 450018 China
2. Henan Key Laboratory of Child Brain Injury Institute of Neuroscience and Third Affiliated Hospital Zhengzhou University Zhengzhou 450052 China
3. Department of Neonatology Qilu Hospital of Shandong University Jinan China
4. Center for Brain Repair and Rehabilitation Institute of Neuroscience and Physiology Sahlgrenska Academy Gothenburg University Gothenburg 40530 Sweden