1. Department of Neonatology, Affiliated Changzhou Children's Hospital of Nantong University, Changzhou, China.
2. Nantong University, Nantong, China.
3. Department of Radiology, Affiliated Changzhou Children's Hospital of Nantong University, Changzhou, China.
4. Institute for Medical Imaging Technology, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China.