1. Drexel University, School of Biomedical Engineering, Science, and Health Systems, Philadelphia, Penn
2. Peking University People’s Hospital, Department of Ultrasound, Beijing
3. The Third Affiliated Hospital of Sun Yat-Sen University, Department of Ultrasound, Guangzhou
4. Thomas Jefferson University, Department of Radiology, Philadelphia, Pennsylvania
5. UT Southwestern, Cancer Prevention Research Institute of Texas, Department of Radiology, Dallas, Tex
6. University of California, Department of Radiology, San Diego, California