1. Department of Ultrasound, Qilu Hospital (Qingdao), Cheeloo College of Medicine Shandong University Qingdao China
2. Department of Gynecology, Qingdao Women and Children's Hospital Qingdao University Qingdao China
3. Department of Radiology, Qilu Hospital (Qingdao), Cheeloo College of Medicine Shandong University Qingdao China
4. Department of Pediatrics, Qilu Hospital (Qingdao), Cheeloo College of Medicine Shandong University Qingdao China