1. Division of General Internal Medicine and Primary Care, Department of Brigham and Women's Hospital; Harvard Medical School; Boston Massachusetts
2. Department of Internal Medicine and Cancer Research Center and School of Medicine; University of New Mexico; Albuquerque New Mexico
3. Group Health Research Institute; Seattle Washington
4. Department of Biostatistics and Epidemiology, Perelman School of Medicine; University of Pennsylvania; Philadelphia Pennsylvania
5. Department of Radiology; University of Washington School of Medicine; Seattle Washington
6. Department of Health Services; University of Washington School of Public Health; Seattle Washington
7. Department of Population Medicine; Harvard Medical School, Harvard Pilgrim Health Care Institute; Boston Massachusetts
8. Department of Medicine, Department of Community and Family Medicine; The Dartmouth Institute, Geisel School of Medicine at Dartmouth; Lebanon New Hampshire
9. Department of Radiology; University of North Carolina at Chapel Hill; Chapel Hill North Carolina
10. Department of Biomedical Science; Geisel School of Medicine at Dartmouth; Lebanon New Hampshire