1. From the Department of Medical Ultrasonics Institute of Diagnostic and Interventional Ultrasound the First Affiliated Hospital of Sun Yat‐sen University Sun Yat‐sen University Guangzhou China
2. Department of Pediatric Surgery the First Affiliated Hospital of Sun Yat‐sen University Sun Yat‐sen University Guangzhou China
3. Department of Pathoglogy the First Affiliated Hospital of Sun Yat‐sen University Sun Yat‐sen University Guangzhou China