1. University of Pittsburgh School of Nursing, Department of Health and Community Systems, Pittsburgh, PA, USA
2. University of Pittsburgh School of Medicine, Department of Psychiatry, Pittsburgh, PA, USA
3. University of Pittsburgh School of Social Work, Pittsburgh, PA, USA
4. University of Pittsburgh School of Public Health, Department of Human Genetics, Pittsburgh, PA, USA
5. University of Michigan School of Public Health, Department of Health Behavior & Health Education, Ann Arbor, MI, USA
6. University Center for Social and Urban Research, Pittsburgh, PA, USA