1. Department of Ultrasound Affiliated Hospital of Jiangsu University Zhenjiang 212000 P. R. China
2. Department of Ultrasound The Fourth Affiliated Hospital Nanjing Medical University Nanjing 210029 P. R. China
3. Tongji University School of Medicine Shanghai Tenth People's Hospital Tongji University Cancer Center Shanghai Engineering Research Center of Ultrasound Diagnosis and Treatment National Clinical Research Center of Interventional Medicine Shanghai 200072 P. R. China
4. Materdicine Lab School of Life Sciences Shanghai University Shanghai 200444 P. R. China