1. Department of Family and Community Health, University of Pennsylvania School of Nursing, Philadelphia, Pennsylvania, USA
2. Department of Medicine, Division of Infectious Diseases, Georgetown University, Washington, District of Columbia, USA
3. Department of Infectious Diseases and Microbiology, University of Pittsburgh Graduate School of Public Health, Pittsburgh, Pennsylvania, USA
4. Department of Behavioral and Community Health Sciences, University of Pittsburgh Graduate School of Public Health, Pittsburgh, Pennsylvania, USA
5. Department of Psychiatry and Behavioral Sciences, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
6. Department of Family Medicine and Psychiatry and Biobehavioral Sciences, University of California – Los Angeles, Los Angeles, California, USA
7. Department of International Health, Johns Hopkins University Bloomberg School of Public Health, Baltimore, Maryland, USA