1. Department of Radiology, Memorial Sloan Kettering Cancer Center, 1275 York Ave, New York, NY 10065.
2. Hospital Sirio-Libanes, São Paulo, Brazil.
3. Department of Radiology, Tallaght University Hospital, Tallaght, Dublin, Ireland.
4. Department of Radiology, Wake Forest Health Sciences Center, Winston-Salem, NC.
5. Department of Radiology, Brigham and Women's Hospital, Boston, MA.
6. Department of Imaging, Dana-Farber Cancer Institute, Boston, MA.