1. Department of Imaging Physics; The University of Texas MD Anderson Cancer Center; Houston TX 77030 USA
2. Departments of Radiation Oncology; Biomedical Physics and Bioengineering; UCLA; Los Angeles CA 90095 USA
3. Department of Medicine; University of Hawai'i at Manoa; Honolulu HI 96813 USA
4. High-Field Magnetic Resonance Center; Max Planck Institute for Biological Cybernetics; 72076 Tubingen Germany
5. Department of Radiology; University of Navarra Hospital; 31008 Pamplona Spain
6. DMC R&D Center; Samsung Electronics Inc.; Seocho-gu 06765 Seoul Korea
7. Department of Statistics; University of Pittsburgh; Pittsburgh PA 15213 USA
8. Department of Surgery; Washington University in St. Louis; St. Louis MO 63110 USA
9. Department of Electrical and Computer Engineering; Virginia Commonwealth University; Richmond VA 23284 USA
10. Departments of Radiation Oncology and Radiology; Washington University; St. Louis MO 63110 USA