1. Department of Medical Ultrasonics, Fujian Provincial Maternity and Children's Hospital Affiliated Hospital of Fujian Medical University Fuzhou City China
2. Department of Medical Ultrasonics, Institute for Diagnostic and Interventional Ultrasound, the First Affiliated Hospital Sun Yat‐Sen University Guangzhou China
3. Department of Pathology, Fujian Provincial Maternity and Children's Hospital Affiliated Hospital of Fujian Medical University Fuzhou City China
4. Department of Pediatric Surgery, Fujian Provincial Maternity and Children's Hospital Affiliated Hospital of Fujian Medical University Fuzhou City China