1. Department of Medical Ultrasound, Guangzhou First People's Hospital; Guangzhou China
2. Institute of Family Planning Research, Tongji Medical College; Huazhong University of Science and Technology; Wuhan China
3. Department of Pathology; Wuhan Children Hospital, Tongji Medical College, Huazhong University of Science and Technology; Wuhan China
4. Department of Urology; First College of Clinical Medical Science/Yichang Central People's Hospital, Three Gorges University; Yichang China
5. Department of Gastroenterology; Tianyou Hospital affiliated to Wuhan University of Science & Technology; Wuhan China
6. Department of Obstetrics and Gynecology; Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology; Wuhan China