1Department of Social Medicine, University of North Carolina, Chapel Hill, USA
2Center for Health Equity Research, University of North Carolina, Chapel Hill, USA
3Department of Psychiatry and Weill Institute for Neurosciences, University of California, San Francisco, USA
4Department of Medicine, University of California, San Francisco, USA
5Department of Medicine, Brown University, Providence, USA
6Department of Social Work and Sociology, North Carolina Agricultural and Technical University, Greensboro, USA
7AIDS Program, Yale School of Medicine, New Haven, USA