1. University of Pittsburgh , Pittsburgh, Pennsylvania , USA
2. Harvard TH Chan School of Public Health , Boston, Massachusetts , USA
3. University of Washington , Seattle, Washington , USA
4. Social & Scientific Systems, A DLH Holdings Company , Silver Spring, Maryland , USA
5. Office of the Global AIDS Coordinator Department of State , Washington, DC , USA
6. University of North Carolina , Chapel Hill, North Carolina , USA
7. Massachusetts General Hospital and Harvard Medical School , Boston, Massachusetts , USA