1. The School of Nursing; University of North Carolina; Chapel Hill NC USA
2. Division of General Medicine; The Cecil G. Sheps Center for Health Services Research; University of North Carolina; Chapel Hill NC USA
3. Division of General Internal Medicine; Northwestern University; Evanston IL USA
4. Division of General Internal Medicine Department of Medicine at San Francisco General Hospital; University of California; San Francisco CA USA
5. School of Nursing; University of California; Los Angeles CA USA
6. Department of Health Policy and Management; University of North Carolina; Chapel Hill NC USA
7. The Cecil G. Sheps Center for Health Services Research; University of North Carolina; Chapel Hill NC USA
8. Division of General Medicine; University of North Carolina; Chapel Hill NC USA
9. University of Colorado School of Medicine; Aurora CO USA