1. Department of Radiology, Duke University Medical Center, Durham, North Carolina2Department of Pharmacology and Cancer Biology, Duke University Medical Center, Durham, North Carolina
2. Division of Cancer Prevention, National Cancer Institute, Bethesda, Maryland
3. Center for Statistical Sciences, Brown School of Public Health, Providence, Rhode Island5Department of Biostatistics, Brown School of Public Health, Providence, Rhode Island
4. Center for Statistical Sciences, Brown School of Public Health, Providence, Rhode Island
5. Department of Community Health Sciences, Brock University, St Catharines, Ontario, Canada
6. Department of Radiology, Wake Forest University Health Sciences Center, Winston-Salem, North Carolina
7. Department of Radiology, Dartmouth Medical School, Hanover, New Hampshire9Department of Community and Family Medicine, Dartmouth Medical School, Hanover, New Hampshire
8. Department of Radiology, University of California, Los Angeles