1. Department of Radiology, HuaDong Hospital, Fudan University, Shanghai, China.
2. Dana Farber Cancer Institute, Boston, MA.
3. Department of Radiology, Brigham and Women's Hospital, Harvard Medical School, 75 Francis St, L1-050, Boston, MA 02115.
4. Department of Radiology, Dana Farber Cancer Institute, Harvard Medical School, Boston, MA.
5. Department of Surgery, Brigham and Women's Hospital, Harvard Medical School, Boston, MA.