1. RAND Corporation, Pittsburgh, PA, USA
2. Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
3. Rutgers School of Public Health, Rutgers University, Newark, NJ, USA
4. Georgetown University Medical Center, Washington, DC, USA
5. Department of Family and Community Health, University of Pennsylvania School of Nursing, Philadelphia, PA, USA
6. Brookdale Center for Healthy Aging, Hunter College, New York, NY, USA
7. Department of Behavioral and Community Health Sciences, University of Pittsburgh Graduate School of Public Health, Pittsburgh, PA, USA
8. Los Angeles LGBT Center, Los Angeles, CA, USA
9. Northwestern University Feinberg School of Medicine, Chicago, IL, USA