1. Division of Infectious Diseases, Beth Israel Deaconess Medical Center, Boston, Massachusetts.
2. The Fenway Institute, Fenway Health, Boston, Massachusetts.
3. Department of Global Health and Social Medicine, Harvard Medical School, Boston, Massachusetts.
4. Division of Health Services, Policy and Practice, Brown University, Providence, Rhode Island.
5. Division of Clinical Decision Making, Tufts Medical Center, Tufts University School of Medicine, Boston, Massachusetts.