1. Department of Biomedical Data Sciences; Geisel School of Medicine at Dartmouth; Hanover New Hampshire
2. The Dartmouth Institute for Health Policy and Clinical Practice and Norris Cotton Cancer Center; Geisel School of Medicine at Dartmouth; Hanover New Hampshire
3. Group Health Research Institute; Seattle Washington
4. Departments of Medicine and Epidemiology and Biostatistics; University of California at San Francisco; San Francisco California
5. General Internal Medicine Section; Department of Veterans Affairs; University of California at San Francisco; San Francisco California
6. Department of Radiology; The University of North Carolina; Chapel Hill North Carolina
7. Department of Biostatistics; University of Pennsylvania; Philadelphia Pennsylvania