1. Veterans Affairs Eastern Colorado Healthcare System, Denver; and University of Colorado School of Medicine; Aurora
2. Veterans Affairs Medical Center; Durham North Carolina
3. Veterans Affairs Medical Center and Duke University Medical Center; Durham North Carolina
4. Gillings School of Global Public Health; University of North Carolina; Chapel Hill
5. University of North Carolina; Chapel Hill
6. Warren Alpert Medical School at Brown University; Providence Rhode Island
7. University of Arizona College of Medicine; Tucson
8. Veterans Affairs Medical Center, Durham; and University of North Carolina; Chapel Hill