1. Department of Ultrasound The Third People's Hospital of Chengdu Affiliated Hospital of Southwest Jiaotong University Chengdu Sichuan 610031 P. R. China
2. Department of Gastroenterology The Third People's Hospital of Chengdu Affiliated Hospital of Southwest Jiaotong University Chengdu Sichuan 610031 P. R. China
3. Materdicine Lab School of Life Sciences Shanghai University Shanghai 200444 P. R. China
4. Department of Ultrasound Chongqing Key Laboratory of Ultrasound Molecular Imaging the Second Affiliated Hospital of Chongqing Medical University Chongqing 400010 P. R. China
5. Department of Medical Ultrasound National Clinical Research Center of Interventional Medicine Shanghai Tenth People's Hospital Tongji University Cancer Center School of Medicine Tongji University Shanghai 200072 P. R. China
6. Laboratory Center Shanghai Municipal Hospital of Traditional Chinese Medicine Shanghai University of Traditional Chinese Medicine Shanghai 200071 P. R. China
7. Shanghai Institute of Materdicine Shanghai 200051 P. R. China