1 Department of Neonatology, Third Affiliated Hospital of Zhengzhou University, Zhengzhou, China.
2 Henan Key Laboratory of Child Brain Injury, Zhengzhou, China.
3 Perinatal Center, Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
4 Center for Brain Repair and Rehabilitation, Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.