1. Department of Radiology, University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd, Unit 1473, Houston, TX 77030.
2. Department of Radiology, Koç University Hospital, Istanbul, Turkey.
3. Department of Biostatistics, University of Texas MD Anderson Cancer Center, Houston, TX.
4. Department of Surgical Oncology, University of Texas MD Anderson Cancer Center, Houston, TX.
5. Department of Anatomical Pathology, University of Texas MD Anderson Cancer Center, Houston, TX.